ISMAILOV, Z.; AL, P. I. Boundedly solvable neutral type delay differential operators of the first order. Eurasian Mathematical Journal, [S. l.], v. 10, n. 3, p. 20–27, 2019. DOI: 10.32523/2077-9879-2019-10-3-20-27. Disponível em: https://emj.enu.kz/index.php/main/article/view/152. Acesso em: 30 sep. 2026.