MATYCHUK, M. I. Problems for equations with special parabolic operator of fractional differentiation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 8, p. 1088–1097, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3082. Acesso em: 6 dec. 2025.