Y. V. Zhernovoi, “Conditions for one-valued solvability of nonlinear stationary heat-conduction problems”, Ukr. Mat. Zhurn., vol. 51, no. 4, pp. 562–567, Apr. 1999, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4641