Belov, G. “Application of Linear Programming Techniques to Equilibrium Composition Calculations for Heterogeneous Systems With Mixtures”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 10, no. 19, Dec. 2008, pp. 56-61, https://en.num-meth.ru/index.php/journal/article/view/347.