Gol’dman, N. L. “Nonlinear Parabolic Problems With an Unknown Source Function and Their Applications for Modelling and Control of Filtration Processes”. Numerical Methods and Programming (Vychislitel’nye Metody I Programmirovanie), vol. 23, no. 73, Sept. 2022, pp. 207-29, doi:10.26089/NumMet.v23r313.