Samoilenko, A.M., Berezovsky, A.A. and Zhemukhov, K.K. (1990) “School-seminar ‘Nonlinear boundary value problems of mathematical physics and their applications’”, Ukrains’kyi Matematychnyi Zhurnal, 42(6), pp. 864–865. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8856 (Accessed: 6 December 2025).