[1]
A. A. Berezovsky, M. P. Lenyuk, and A. M. Samoilenko, “School-Seminar ‘Nonlinear boundary-value problems in Mathematical Physics and their applications’”, Ukr. Mat. Zhurn., vol. 48, no. 6, pp. 863–865, Jun. 1996, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5289