ŠTIKONAS, Artūras. About the geometrical properties of the root condition for the third order polynomials. Lietuvos matematikos rinkinys, [S. l.], v. 39, n. III, p. 430–435, 1999. DOI: 10.15388/LMD.1999.35689. Disponível em: https://www.journals.vu.lt/LMR/article/view/35689. Acesso em: 11 apr. 2025.