KALIMBETOV, B.T.; SAFONOV, V.F. Integro-differentiated singularly perturbed equations with fast oscillating coefficients. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 94, n. 2, p. 33–47, 2019. DOI: 10.31489/2019m2/33-47. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/273. Acesso em: 18 aug. 2025.