A Gibbs free energy minimization based model for liquid–liquid equilibrium calculation of a system containing oil, brine, and surfactantMostafa Hosseini and Amir H. MohammadiOil Gas Sci. Technol. – Rev. IFP Energies nouvelles, 75 (2020) 17DOI: https://doi.org/10.2516/ogst/2020012