LAVRENYUK, S. P.; PROTSAKH, N. P. Mixed problem for a nonlinear ultraparabolic equation that generalizes the diffusion equation with inertia. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 9, p. 1192–1210, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3522. Acesso em: 6 dec. 2025.