MOLLER, J. M. On polynomial coverings and their classification. MATHEMATICA SCANDINAVICA, [S. l.], v. 47, p. 116–122, 1980. DOI: 10.7146/math.scand.a-11877. Disponível em: https://www.mscand.dk/article/view/11877. Acesso em: 6 may. 2024.