SHEREMETA, M. On the finiteness of the $l$-$\mathfrak{M}$-index of entire functions represented by series in а system of functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 76, n. 4, p. 599–606, 2024. DOI: 10.3842/umzh.v74i4.7866. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7866. Acesso em: 5 dec. 2025.