S. D. Ivasyshen and V. A. Litovchenko, “Cauchy problem for a class of degenerate kolmogorov-type parabolic equations with nonpositive genus”, Ukr. Mat. Zhurn., vol. 62, no. 10, pp. 1330–1350, Oct. 2010, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2958