PERESTYUK, N. A.; RONTO, A. M. On a method for construction of successive approximations for investigation of multipoint boundary-value problems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 9, p. 1243–1253, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5524. Acesso em: 14 apr. 2025.