RONTO, M. I.; SAVINA, T. V. A numerical-analytic method for three-point boundary-value problems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 4, p. 393–403, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5736. Acesso em: 16 dec. 2025.