MALYSHEV, V.P.; KAZHIKENOVA, S.Sh.; MAKASHEVA, A.M.; KAZHIKENOVA, A.Sh. Isomorphism Theorems of a Series Sum and the Improper Integral. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 113, n. 1, p. 128–139, 2024. DOI: 10.31489/2024m1/128-139. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/689. Acesso em: 4 sep. 2025.