Lavrenyuk SP, Oliskevych MO. Mixed problem for a semilinear ultraparabolic equation in an unbounded domain. Ukr. Mat. Zhurn. [Internet]. 2007 Dec. 25 [cited 2025 Dec. 6];59(12):1661–1673. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3420