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{in reverse chronological order}

Implicit-solvent Models for Micellization of Ionic Surfactants
A. Jusufi, A.-P. Hynninen and A. Z. Panagiotopoulos, J. Phys. Chem. B, 112, 13783-13792 (2008).
Invited topical review: Simulations of phase transitions and free energies for ionic systems
A.-P. Hynninen and A. Z. Panagiotopoulos, Molec. Phys., 106, 2039-2051 (2008).
Preparation of Poly(ethylene glycol) Protected Nanoparticles with Variable Bioconjugate Ligand Density
M. E. Gindy, S. Ji, T. R. Hoye, A. Z. Panagiotopoulos and R. K. Prud’homme, Biomacromolecules, 9, 2705-2711 (2008).
Surfactant and Hydrocarbon Aggregates on Defeective Graphite Surfaces: Structure and Dynamics
M. Sammalkorpi, A. Z. Panagiotopoulos and M. Haataja, J. Phys. Chem. B, 112, 12954-12961 (2008).
Phase behavior and structure formation in linear multiblock copolymer solutions by Monte Carlo simulation
M. E. Gindy, R. K. Prud’homme and A. Z. Panagiotopoulos, J. Chem. Phys., 128, 164906 (2008).
Structure and Dynamics of Surfactant and Hydrocarbon Aggregates on Graphite: A Molecular Dynamics Simulation Study
M. Sammalkorpi, A. Z. Panagiotopoulos and M. Haataja, J. Phys. Chem. B, 112, 2915-2921 (2008).
Composite Block Copolymer Stabilized Nanoparticles: Simultaneous Encapsulation of Organic Actives and Inorganic Nanostructures
M. E. Gindy, A. Z. Panagiotopoulos and R. K. Prud'homme, Langmuir, 24, 83-90 (2008).
Monte Carlo simulation and molecular theory of tethered polyelectrolytes
O. J. Hehmeyer, G. Arya, A. Z. Panagiotopoulos and I. Szleifer, J. Chem. Phys., 126, 244902 (2007).
Disappearance of the Gas-Liquid Phase Transition for Highly Charged Colloids
A.-P. Hynninen and A. Z. Panagiotopoulos, Phys. Rev. Lett., 98, 198301 (2007) [Editor's Suggestion].
Effective potentials for 1:1 electrolyte solutions incorporating dielectric saturation and repulsive hydration
P. J. Lenart, A. Jusufi, and A. Z. Panagiotopoulos, J. Chem. Phys., 126, 044509 (2007).
Phase behavior of binary Stockmayer and polarizable Lennard-Jones fluid mixtures using adiabatic nuclear and electronic sampling
P. J. Lenart and A. Z. Panagiotopoulos, Ind. Eng. Chem. Res., 45, 6929-38 (2006).
Tracing the critical loci of binary fluid mixtures using molecular simulation
P. J. Lenart and A. Z. Panagiotopoulos, J. Phys. Chem. B, 110, 17200-6 (2006).
Monte Carlo simulation of the phase behavior of model dendrimers
A. N. Rissanou, I. G. Economou and A. Z. Panagiotopoulos, Macromolecules, 39, 6298-6305 (2006).
Computer simulations of phase transitions of bulk and confined colloid–polymer systems
C.-Y. Chou, T.T.M. Vo, A.Z. Panagiotopoulos and M. Robert, Physica A, 369, 275-290 (2006).
Phase behavior of rigid objects on a cubic lattice
J. R. Davis, M. V. Piccarreta, R. B. Rauch, T. K. Vanderlick, and A. Z. Panagiotopoulos, Ind. Eng. Chem. Res., 45, 5421-25 (2006).
Global phase diagram for the honeycomb potential
A.-P. Hynninen, A. Z. Panagiotopoulos, M. C. Rechtsman, F. H. Stillinger, and S. Torquato, J. Chem. Phys., 125, 024505 (2006).
Effect of stiffness on the micellization behavior of model H4T4 surfactant chains
V. Firetto, M. A. Floriano and A. Z. Panagiotopoulos, Langmuir, 22, 6514-22 (2006).
Phase behavior of the lattice restricted primitive model with nearest neighbor exclusion
A. Diehl and A. Z. Panagiotopoulos, J. Chem. Phys., 124, 194509, 6 pp (2006).
Monte Carlo simulations of micellization in model ionic surfactants: Application to Sodium Dodecyl Sulfate
D. Cheong and A. Z. Panagiotopoulos, Langmuir, 22, 4076-83 (2006).
A conformal solution theory for the energy landscape and glass transition of mixtures
M. S. Shell, P.G. Debenedetti and A. Z. Panagiotopoulos, Fluid Phase Equil., 241, 147-154 (2006).
Computational characterization of the sequence landscape in simple protein alphabets
M. S. Shell, P.G. Debenedetti and A. Z. Panagiotopoulos, Proteins: Structure, Function and Bioinformatics, 62, 232-243 (2006).
Universality of ionic criticality: Size- and charge-asymmetric electrolytes
Y. C. Kim, M. E. Fisher and A. Z. Panagiotopoulos, Phys. Rev. Lett, 95, 195703 (2005).
Impact of branching on the phase behavior of polymers
G. Arya and A. Z. Panagiotopoulos Macromolecules, 38, 10596-604 (2005) and erratum.
Shear ordering in thin films of spherical block copolymer
G. Arya, J. Rottler, A. Z. Panagiotopoulos, D. J. Srolovitz and P. M. Chaikin, Langmuir, 21, 11518-27 (2005).
Log-rolling micelles in sheared amphiphilic thin films
G. Arya and A. Z. Panagiotopoulos, Phys. Rev. Lett, 95, 188301 (2005).
Phase behaviour of polyampholyte chains from grand canonical Monte Carlo simulations
D. W. Cheong and A. Z. Panagiotopoulos, Molec. Phys., 103, 3031-44 (2005).
Thermodynamic properties of lattice hard-sphere models
A. Z. Panagiotopoulos, J. Chem. Phys., 123, 104504, 5 pp (2005).
Critical point of electrolyte mixtures
A.-P. Hynninen, M. Dijkstra, and A. Z. Panagiotopoulos, J. Chem. Phys., 123, 084903, 9 pp (2005).
Simulations of phase transitions in ionic systems
A. Z. Panagiotopoulos, J. Phys.: Condens. Matter, 17, S3207-13 (2005).
Molecular modeling of shear-induced alignment of cylindrical micelles
G. Arya and A. Z. Panagiotopoulos, Comp. Phys. Comm., 169, 262-266 (2005).
Phase diagrams in the lattice restricted primitive model: From order-disorder to gas-liquid phase transition
A. Diehl and A. Z. Panagiotopoulos, Phys. Rev. E, 71, 046118, 7pp (2005).
Effect of Stiffness on the Phase Behavior of Cubic Lattice Chains
M. A. Floriano, V. Firetto and A. Z. Panagiotopoulos, Macromolecules, 38, 2475-81 (2005).
Coarse-grained kinetic computations for a micellar system
D. I. Kopelevich, A. Z. Panagiotopoulos and I. G. Kevrekidis, J. Chem. Phys., 122, 044907, 14 pp (2005).
Coarse-grained kinetic computations for rare events: Application to micelle formation,
D. I. Kopelevich, A. Z. Panagiotopoulos and I. G. Kevrekidis, J. Chem. Phys., 122, 044908, 13 pp (2005).
Flat-Histogram Dynamics and Optimization in Density of States Simulations of Fluids
M. Scott Shell, P. G. Debenedetti and A. Z. Panagiotopoulos, J. Phys. Chem. B, 108, 19748-55 (2004).
Molecular simulation of the solubility of carbon dioxide in aqueous solutions of sodium chloride
J. Vorholz, V. I. Harismiadis, A. Z. Panagiotopoulos, B. Rumpf, G. Maurer, Fluid Phase Equil., 226, 237-50 (2004).
Monte Carlo study of shear-induced alignment of cylindrical micelles in thin films
G. Arya and A. Z. Panagiotopoulos, Phys. Rev. E, 70, 031501 (2004).
Finely discretized lattice simulations of SPC/E water
C. S. Lock, S. Moghaddam and A. Z. Panagiotopoulos, Fluid Phase Equilibria, 222-3, 225-30 (2004).
Determination of second virial coefficients by grand canonical Monte Carlo simulations
S. Moghaddam and A. Z. Panagiotopoulos, Fluid Phase Equilibria, 222-3, 221-4 (2004).
Phase Transitions of Confined Lattice Homopolymers
O. J. Hehmeyer, G. Arya and A. Z. Panagiotopoulos, J. Phys. Chem. B, 108, 6809-15 (2004) [Andersen Festschrift].
Saddles in the Energy Landscape: Extensivity and Thermodynamic Formalism,
M. S. Shell, P. G. Debenedetti and A. Z. Panagiotopoulos, Phys. Rev. Lett., 92, 035506 (2004).
Grand canonical Monte Carlo simulations of phase equilibria of pure silicon tetrachloride and its binary mixture with carbon dioxide,
O. M. Suleimenov, A. Z. Panagiotopoulos and T. M. Seward , Molec. Phys., 101, 3213-3221 (2003).
Thermodynamics of electrolytes on anisotropic lattices
V. Kobelev, A. B. Kolomeisky and A. Z. Panagiotopoulos, Phys. Rev. E, 68, 066110 (2003).
Critical parameters of unrestricted primitive model electrolytes with charge asymmetries up to 10:1,
D. W. Cheong and A. Z. Panagiotopoulos, J. Chem. Phys., 119, 8526-36 (2003).
An improved Monte Carlo method for direct calculation of the density of states,
M. S. Shell, P. G. Debenedetti and A. Z. Panagiotopoulos, J. Chem. Phys., 119, 9406-11 (2003).
Competing Ranges of Attractive and Repulsive Interactions in the Micellization of Model Surfactants
S. Salaniwal, S. K. Kumar and A. Z. Panagiotopoulos, Langmuir, 19(12), 5164-8 (2003).
Lattice discretization effects on the critical parameters of model nonpolar and polar fluids,
S. Moghaddam and A. Z. Panagiotopoulos, J. Chem. Phys., 118, 7556-61 (2003).
Phase transitions and tricriticality in the lattice restricted primitive model supplemented by short-range interactions,
A. Diehl and A. Z. Panagiotopoulos, J. Chem. Phys., 118, 4993-4998 (2003).
Monte Carlo Study of Coulombic Criticality in Polyelectrolytes,
G. Orkoulas, S. K. Kumar and A. Z. Panagiotopoulos, Phys. Rev. Lett., 90, 048303 (2003).
Generalization of the Wang-Landau method for off-lattice simulations,
M. S. Shell, P. G. Debenedetti and A. Z. Panagiotopoulos, Phys. Rev. E, 66, 056703 (2002).
Dipolar origin of the gas-liquid coexistence of the hard-core 1:1 electrolyte model
J. M. Romero-Enrique, L. F. Rull and A. Z. Panagiotopoulos, Phys. Rev. E, 66, 041204 (2002).
Coarse bifurcation analysis of kinetic Monte Carlo simulations: A lattice-gas model with lateral interactions
A. G. Makeev, D. Maroudas, A. Z. Panagiotopoulos, and I. G. Kevrekidis, J. Chem. Phys., 117, 8229-40 (2002).
Molecular structural order and anomalies in liquid silica
M. S. Shell, P. G. Debenedetti, and A. Z. Panagiotopoulos, Phys. Rev. E, 66, 011202 (2002).
Universality Class of Criticality in the Restricted Primitive Model Electrolyte
E. Luijten, M. E. Fisher and A. Z. Panagiotopoulos, Phys. Rev. Lett., 88, 185701 (2002).
Gibbs ensemble Monte Carlo simulations of coexistence properties of a polarizable potential model of water
L. X. Dang, T.-M. Chang and A. Z. Panagiotopoulos, J. Chem. Phys., 117, 3522-3 (2002).
Micellization and Phase Separation of Diblock and Triblock Model Surfactants
A. Z. Panagiotopoulos, M. A. Floriano and S. K. Kumar, Langmuir, 18(7), 2940-48 (2002).
Ternary Oil-Water-Amphiphile Systems: Self-Assembly and Phase Equilibria
S.-Y. Kim, A. Z. Panagiotopoulos and M. A. Floriano, Molec. Phys., 100, 2213-20 (2002).
Phase Transitions in 2:1 and 3:1 Hard-Core Model Electrolytes
A. Z. Panagiotopoulos and M. E. Fisher, Phys. Rev. Lett., 045701 (2002).
Self-assembly of surfactants in a supercritical solvent from lattice Monte Carlo simulations
M. Lisal, C. K. Hall, K. E. Gubbins and A. Z. Panagiotopoulos, J. Chem. Phys., 116, 1171-1184 (2002).
Quantitative Lattice Simulations of the Structure and Thermodynamics of Macromolecules,
A. Indrakanti, J. K. Maranas, A. Z. Panagiotopoulos and S. K. Kumar, Macromolecules, 34, 8596-99 (2001).
Critical parameters of the restricted primitive model,
A. Z. Panagiotopoulos, J. Chem. Phys.,116, 3007-11(2002).
A SANS study of the conformational behavior of linear chains in strained and unstrained end-linked elastomers,
N. Gilra, C. Cohen, R. M. Briber, B. J. Bauer and A. Z. Panagiotopoulos, Macromolecules, 34, 7773-82 (2001).
Monte Carlo Simulations of Polymer Network Deformation
N. Gilra, A. Z. Panagiotopoulos and C. Cohen, Macromolecules, 34, 6090-6 (2001).
Monte Carlo simulations of free chains in end-linked polymer networks
N. Gilra, A. Z. Panagiotopoulos and C. Cohen, J. Chem. Phys., 115, 1100-1104 (2001).
Precise simulation of criticality in asymmetric fluids
 G. Orkoulas, M. E. Fisher and A. Z. Panagiotopoulos,  Phys. Rev. E, 63, art. No 051507 (2001).
The Heat Capacity of the Restricted Primitive Model Electrolyte
E. Luijten, M. E. Fisher and A. Z. Panagiotopoulos, J. Chem. Phys., 114, 5468-71 (2001).
Nanostructure Formation and Phase Separation in Surfactant Solutions
S. K. Kumar, M. A. Floriano and A. Z. Panagiotopoulos, Adv. Chem. Eng., 28, 297-311 (2001).
Coexistence and Criticality in Size-Asymmetric Hard-Core Electrolytes
J. M. Romero-Enrique, G. Orkoulas, A. Z. Panagiotopoulos, M. E. Fisher, Phys. Rev. Lett., 85, 4558-61 (2000).
On the Equivalence of Continuum and Lattice Models for Fluids
A.Z. Panagiotopoulos, J. Chem. Phys., 112, 7132-7 (2000).
Force Field Development for Simulations of Condensed Phases
A.Z. Panagiotopoulos, AIChE Symp. Ser. No. 325,97 61-70 (2001).
Surface tension of the 3-dimensional Lennard-Jones fluid from histogram-reweighting Monte Carlo simulations
J. Potoff and A. Z. Panagiotopoulos, J. Chem. Phys., 112, 6411-5 (2000).
Vapor-Liquid Equilibrium of Water, Carbon Dioxide and the Binary System Water + Carbon Dioxide from Molecular Simulation
J. Vorholz, V. I. Harismiadis, B. Rumpf, A. Z. Panagiotopoulos and G. Maurer, Fluid Phase Equil., 170, 203-34 (2000).
Criticality and crossover in accessible regimes
G. Orkoulas, A. Z. Panagiotopoulos and M. E. Fisher, Phys. Rev. E, 61, 5930-9 (2000).
Molecular Simulation of Phase Equilibria for Water-n-Butane and Water-n-Hexane Mixtures
G.C. Boulougouris, J.R. Errington,  I.G. Economou, A.Z. Panagiotopoulos and D.N. Theodorou, J. Phys. Chem. B, 104, 4958-63 (2000).
A Monte Carlo study of the structural properties of end-linked polymer networks
N. Gilra, C. Cohen and A. Z. Panagiotopoulos, J. Chem. Phys., 112, 6910-6 (2000).
New Intermolecular Potential Models for Benzene and Cyclohexane
J.R. Errington and A.Z. Panagiotopoulos, J. Chem. Phys., 111, 9731-8 (1999).
Large Lattice Discretization Effects on the Phase Coexistence of Ionic Fluids
A.Z. Panagiotopoulos and S.K. Kumar, Phys. Rev. Lett., 83, 2981-84 (1999).
Monte Carlo Methods for Phase Equilibria of Fluids
A.Z. Panagiotopoulos, J. Phys. Condens. Matter, 12, R25-R52 (2000).
Molecular Simulation of Phase Equilibria for Mixtures of Polar and Non-Polar Components
J.J. Potoff, J.R. Errington and A.Z. Panagiotopoulos, Molec. Phys., 97, 1073-83 (1999).
A New Potential Model for the n-Alkanes Homologous Series
J.R. Errington and A.Z. Panagiotopoulos, J. Phys. Chem. B., 103, 6314-22 (1999).
Thermodynamics of Reversibly Associating Polymer Solutions
S.K. Kumar and A.Z. Panagiotopoulos, Phys. Rev. Lett. 82, 5060-63 (1999).
Monte Carlo Simulations of Model Nonionic Surfactants
A.P. Chatterjee and A.Z. Panagiotopoulos, in Computer Simulation Studies in Condensed Matter Physics XII, D.P. Landau, S.P. Lewis and H.B. Schuettler (eds), Spinger Verlag, Berlin (1999).
Micellization in Model Surfactant Systems
M.A. Floriano, E. Caponetti and A.Z. Panagiotopoulos, Langmuir., 15, 3143-51 (1999).
Critical Point and Phase Behavior of the pure fluids and a Lennard-Jones Mixture
J.J. Potoff and A.Z. Panagiotopoulos, J. Chem. Phys., 109, 10914-20 (1998).
Phase Behavior of the Restricted Primitive Model and Square-Well Fluids from Monte Carlo Simulations in the Grand Canonical Ensemble
G. Orkoulas and A. Z. Panagiotopoulos, J. Chem. Phys., 110, 1581-90 (1999).
Simulation of Polymer Melt Intercalation in Layered Nanocomposites
J. Y. Lee, A.R.C. Baljon, R.F. Loring and A.Z. Panagiotopoulos, J. Chem. Phys., 109, 10321-30 (1998).
A Fixed Point Charge Model for Water Optimized to the Vapor-Liquid Coexistence Properties
J.R. Errington and A.Z. Panagiotopoulos, J. Phys. Chem. B, 102, 7470 - 75 (1998).
Molecular Simulation of Phase Equilibria for Water-Methane and Water-Ethane Mixtures
J.R. Errington, G.C. Boulougouris, I.G. Economou, A.Z. Panagiotopoulos and D.N. Theodorou, J. Phys. Chem. B, 102, 8865-73 (1998).
Phase Equilibria of the Modified Buckingham Exponential-6 Potential from Hamiltonian Scaling Grand Canonical Monte Carlo
J.R. Errington and A. Z. Panagiotopoulos, J. Chem. Phys., 109, 1093-1100 (1998).
Phase Coexistence Properties of Polarizable Water Models
K. Kiyohara, K. E. Gubbins and A. Z. Panagiotopoulos, Molec. Phys., 94 , 803-8 (1998).
Phase Equilibria of Lattice Polymers from Histogram Reweighting Monte Carlo Simulations
A.Z. Panagiotopoulos, V. Wong and M.A. Floriano, Macromolecules, 31 (3), 912-918 (1998).
Aggregation behavior of a lattice model for amphiphiles
A.D. Mackie, A.Z. Panagiotopoulos and I. Szleifer, Langmuir, 13 , 5022-31 (1997).
Monte Carlo simulation of high-pressure phase equilibria in aqueous systems
J.R. Errington, K. Kiyohara, K. E. Gubbins and A. Z. Panagiotopoulos, Fluid Phase Equil. 150, 33-40 (1998).
Phase Coexistence Properties of Polarizable Stockmayer Fluids
K. Kiyohara, K. E. Gubbins and A. Z. Panagiotopoulos, J. Chem. Phys. 106, 3338-47 (1997).
Efficient Pressure Estimation in Molecular Simulations without evaluating the Virial
V.I. Harismiadis, J. Vorholz and A.Z. Panagiotopoulos, J. Chem. Phys. 105 , 8469-70 (1996).
Thermodynamic Scaling Gibbs ensemble Monte Carlo: A new method for determination of Phase Coexistence Properties of Fluids
K. Kiyohara, T. Spyriouni, K.E. Gubbins and A.Z. Panagiotopoulos, Molec. Phys. 89 , 965-74 (1996).
Phase equilibria of a lattice model for an oil-water-amphiphile mixture
A.D. Mackie, K. Onur, and A. Z. Panagiotopoulos J. Chem. Phys. 104, 3718-25 (1996).
Phase Diagram of the Two-Dimensional Coulomb Gas: A Thermodynamic Scaling Monte Carlo Study
G. Orkoulas and A. Z. Panagiotopoulos J. Chem. Phys. 104(18), 7205-9 (1996).
Effect of Chain Stiffness on Polymer Phase Behavior
Yu-Jane Sheng, A. Z. Panagiotopoulos, S. K. Kumar, Macromolecules 29, 4444-4446 (1996)
Current advances in Monte Carlo methods
A. Z. Panagiotopoulos, Fluid Phase Equil., 116, 257-266 (1996).
Mixing properties of model polymer/solvent systems
Yu-Jane Sheng, A. Z. Panagiotopoulos, S. K. Kumar, J. Chem. Phys. 103, 10315-24 (1995).
Monte Carlo simulation of phase equilibria for a lattice homopolymer model
A.D. Mackie, A.Z. Panagiotopoulos, and S.K. Kumar, J. Chem. Phys., 102, 1014-23 (1995).
Gibbs Ensemble Techniques
A.Z. Panagiotopoulos, in M. Baus, L.R. Rull and J.P. Ryckaert, Observation, prediction and simulation of phase transitions in complex fluids, NATO ASI Series C, vol 460, pp. 463-501, Kluwer Academic Publishers, Dordrecht, The Netherlands (1995).
Activity Coefficients in Nearly Athermal Model Polymer/Solvent Systems
Yu-Jane Sheng, A.Z. Panagiotopoulos, D.P. Tassios, AIChE J., 41, 2306-13 (1995).
Phase equilibria in ternary Lennard-Jones systems
Peter C. Tsang, Omar N. White, Brigitte Y. Perigard, Lourdes F. Vega and Athanassios Z. Panagiotopoulos, Fluid Phase Equil. 107, 31-43 (1995).
Molecular simulation of phase coexistence: Finite-size effects and determination of critical parameters for two- and three- dimensional Lennard-Jones fluids
Athanassios Z. Panagiotopoulos, Int. J. Thermophys. , 15, 1057 (1994).
Constant-pressure Monte Carlo simulations for lattice models
Allan D. Mackie, Athanassios Z. Panagiotopoulos, Daan Frenkel and Sanat K. Kumar, Europhys. Letts., 27, 549-554 (1994).
Free energy and phase equilibria for the restricted primitive model of ionic fluids from Monte Carlo simulations
G. Orkoulas and A.Z. Panagiotopoulos J. Chem. Phys., 101, 1452-59 (1994).
Chemical potentials and adsorption isotherms of polymers confined between parallel plates
Lourdes F. Vega, Athanassios Z. Panagiotopoulos and Keith E. Gubbins, Chemical Engineering Science, 49, 2921-29 (1994). Also Erratum for this paper.
Erratum: Molecular simulation of phase equilibria: simple, ionic and polymeric fluids
Athanassios Z. Panagiotopoulos, Fluid Phase Equil., 92, 313 (1994) .
Finite-size effects and approach to criticality in Gibbs ensemble simulations
Joel R. Recht and Athanassios Z. Panagiotopoulos, Mol. Phys., 80, 843-852 (1993) .
Effect of sequence and intermolecular interactions on the number and nature of low-energy states for simple model proteins
Eamonn M. O'Toole and A.Z. Panagiotopoulos, J. Chem. Phys., 98, 3185-90 (1993).
Chemical Potentials in Ionic Systems from Monte Carlo Simulations with Distance-Biased Test Particle Insertions
Gerassimos Orkoulas and Athanassios Z. Panagiotopoulos , Fluid Phase Equilibria, 83, 223 (1993).
Chain length and density dependence of the chemical potential of lattice polymers
Igal Szleifer and A.Z. Panagiotopoulos, J. Chem. Phys., Nov 1 1992, v.97 n.9 pg.6666
Molecular simulation of phase equilibria
A. Z. Panagiotopoulos, in Supercritical Fluids - Fundamentals for Application, E. Kiran. and J. M. H. Levelt Sengers (eds.), NATO ASI Series E, 273, Kluwer Academic Publishers: Dordrecht, The Netherlands, pp. 411-437 (1994).
Monte Carlo calculation of phase equilibria for a bead-spring polymeric model
Y.-J. Sheng, A.Z. Panagiotopoulos, S. K. Kumar and I. Szleifer, Macromolecules, 27, 400-406 (1994).