NURGABYL, D.N.; BEKISH, U.A. Asymptotic expansion of the solution of a singularly perturbed boundary value problem with boundary initial jumps. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 88, n. 4, p. 47–55, 2017. DOI: 10.31489/2017m4/47-55. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/178. Acesso em: 10 jul. 2025.