Reshetnyak, M.Yu., and B. Steffen. “The Sensitivity Storage in Problems of Hydraulic Conductivity Identification for Three-Dimensional Aquifers”. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie) 5, no. 5 (January 8, 2004): 41–45. Accessed April 29, 2024. https://en.num-meth.ru/index.php/journal/article/view/115.