“Seminonlinear Boundary Value Problems for Nondegenerate Differential-Algebraic System”. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics 89 (February 25, 2019): 10–20. Accessed October 24, 2026. https://periodicals.karazin.ua/mech_math/article/view/12857.