NEDOKIS, V. A.; SAMOILENKO, A. M.; TEPLINSKY, Yu. V. Truncation method for countable-point boundary-value problems in the space of bounded number sequences. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 9, p. 1203–1230, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3836. Acesso em: 5 dec. 2025.