V. M. Los’, “Mixed Problems for the Two-Dimensional Heat-Conduction Equation in Anisotropic Hörmander Spaces”, Ukr. Mat. Zhurn., vol. 67, no. 5, pp. 645–656, May 2015, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2012