NAZAROVA, K.Zh. The existence of isolated solutions of nonlinear two-point boundary value problem and their properties. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 81, n. 1, p. 51–61, 2016. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/78. Acesso em: 10 jul. 2025.