BEDRATYUK, L. P. Poincare series of the multigraded algebras of SL 2-invariants. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 6, p. 755–763, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2760. Acesso em: 5 dec. 2025.