“About the Regularization of a Linear Nondegenerate Difference-Algebraic Boundary-Value Problem by the Perturbation of the Boundary Condition”. Neliniini Kolyvannya 28, no. 3 (September 29, 2025): 415–424. Accessed April 10, 2026. https://nosc.imath.kiev.ua/index.php/nosc/article/view/1195.