BEDRATYUK, L. P. Analog of the Cayley–Sylvester formula and the Poincaré series for an algebra of invariants of ternary form. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 11, p. 1561–1570, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2980. Acesso em: 7 apr. 2025.