IVANOVA, E. P. Elliptic Differential-Difference Equations with Incommensurable Shifts of Arguments. Eurasian Mathematical Journal, [S. l.], v. 7, n. 3, p. 33–40, 2016. Disponível em: https://emj.enu.kz/index.php/main/article/view/641. Acesso em: 3 jan. 2026.