MOLLER, Jesper Michael. 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://tidsskrift.dk/math/article/view/11877. Acesso em: 14 aug. 2026.