I. D. Pukalskyi, “Cauchy Problem for Nonuniformly Parabolic Equations with Degeneracy”, Ukr. Mat. Zhurn., vol. 55, no. 11, pp. 1520–1529, Nov. 2003, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4021