Piven, V., and D. Lekomtsev. “Mathematical Modeling of Well Operation in the Case of Two-Dimensional Filtration in an Anisotropic Heterogeneous Layer”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 21, no. 63, Feb. 2020, pp. 87-95, doi:10.26089/NumMet.v21r108.