BAKER, Andrew; RAY, Nigel. Some infinte families of U-hypersurfaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 50, p. 149–166, 1982. DOI: 10.7146/math.scand.a-11952. Disponível em: https://journals.msp.org/mscand/article/view/1695. Acesso em: 25 jul. 2026.