Mikhalev, A., I. Oferkin, I. Oseledets, A. Sulimov, E. Tyrtyshnikov, and V. Sulimov. “Application of the Multicharge Approximation for Large Dense Matrices in the Framework of the Polarized Continuum Solvent Model”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 15, no. 39, Jan. 2014, pp. 9-21, https://en.num-meth.ru/index.php/journal/article/view/745.