Boichuk О. A.; CHUIKO, E. V.; CHUIKO, S. M. Generalized Green operator of a boundary-value problem with degenerate pulse influence. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 5, p. 588–594, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5291. Acesso em: 5 dec. 2025.