KENZIZI, T. Existence of nonnegative solutions for a fractional parabolic equation in the whole space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 8, p. 1064–1072, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1498. Acesso em: 5 dec. 2025.