Serbina, Ludmila. “The Solution of an Initial-Boundary Value Problem of the Filtration Theory With Nonlocal Boundary Condition”. Nonlinear Analysis: Modelling and Control 19, no. 3 (October 30, 2014): 488–502. Accessed April 27, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/13649.