ELEEV, V. A. Boundary-value problem for a mixed parabolic-hyperbolic equation of the third order. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 1, p. 20–29, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5378. Acesso em: 5 dec. 2025.