LOS’, V. M. Sufficient conditions under which the solutions of general parabolic initial-boundaryvalue problems are classical. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 11, p. 1518–1527, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1938. Acesso em: 5 dec. 2025.