ZUNNUNOV, R.T.; ERGASHEV, A.A. A problem with shift for a mixed-type model equation of the second kind in an unbounded domain. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 106, n. 2, p. 202–207, 2022. DOI: 10.31489/2022m2/202-207. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/539. Acesso em: 4 sep. 2025.