BAZALII, B. V.; TEDEEV, A. F. Symmetrization and initial boundary-value problems for certain classes of nonlinear second order parabolic equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 7, p. 884–892, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5880. Acesso em: 27 apr. 2025.