ASSANOVA, A.T.; ISKAKOVA, N.B.; ORUMBAYEVA, N.T. Well-posedness of a periodic boundary value problem for the system of hyperbolic equations with delayed argument. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 89, n. 1, p. 8–14, 2018. DOI: 10.31489/2018m1/8-14. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/182. Acesso em: 10 jul. 2025.