ISLOMOV, B. I.; OCHILOVA, N. K.; SADARANGANI, K. S. On a Frankl-type boundary-value problem for a mixed-type degenerating equation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 10, p. 1347–1359, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1519. Acesso em: 5 dec. 2025.