KOVTUN, I. I.; FELLER, M. N. Boundary-value problems for a nonlinear parabolic equation with Lévy Laplacian resolved with respect to the derivative. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 10, p. 1400–1407, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2964. Acesso em: 5 dec. 2025.