Nazarova, K. (2016) “The existence of isolated solutions of nonlinear two-point boundary value problem and their properties”, Bulletin of the Karaganda University. Mathematics Series, 81(1), pp. 51–61. Available at: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/78 (Accessed: 10 July 2025).