LavrenyukS. P. and OliskevychM. O. (2007) “Mixed problem for a semilinear ultraparabolic equation in an unbounded domain”, Ukrains’kyi Matematychnyi Zhurnal, 59(12), pp. 1661–1673. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3420 (Accessed: 24November2024).