Nedokis, V.A., Samoilenko, A.M. and Teplinsky, Y.V. (2004) “Truncation method for countable-point boundary-value problems in the space of bounded number sequences”, Ukrains’kyi Matematychnyi Zhurnal, 56(9), pp. 1203–1230. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3836 (Accessed: 5 December 2025).