OSTROVSKII, V. L. Representation of an algebra associated with the Dynkin graph $\tilde E_7$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 9, p. 1193–1202, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3835. Acesso em: 5 dec. 2025.