OMEL'CHENKO, P. V. About $\ast$-representations of polynomial semilinear relations. Methods of Functional Analysis and Topology, [S. l.], v. 15, n. 2, p. 168–176, 2009. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/416. Acesso em: 16 dec. 2025.