LATREUCH, Z.; BELAÏDI, B. Linear Differential Equations With Analytic Coefficients of ${[P,Q]}$-Order in the Unit Disc. Sarajevo Journal of Mathematics, [S. l.], v. 9, n. 1, p. 71–84, 2024. DOI: 10.5644/SJM.09.1.06. Disponível em: https://sjm.anubih.ba/index.php/sjm/article/view/248. Acesso em: 15 oct. 2024.