BEISENOVA, D.R.; OSPANOV, K.N. Maximal regularity and compactness conditions for a high order system of difference equations. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 92, n. 4, p. 15–28, 2018. DOI: 10.31489/2018m4/15-28. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/234. Acesso em: 1 jul. 2025.