LOPUSHANSKAYA, G. P. Basic boundary-value problems for one equation with fractional derivatives. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 1, p. 48–59, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4582. Acesso em: 5 dec. 2025.