“Про функціональну модель обмеженого оператору”. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics, no. 1133 (October 22, 2014): 95–102. Accessed October 23, 2026. https://periodicals.karazin.ua/mech_math/article/view/4638.