DZHALLADOVA, I. A. Construction of a periodic system of moment equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 6, p. 774–780, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4887. Acesso em: 27 apr. 2025.