LANDWEBER, Peter S. Elements of Infinite Filtration in Complex Cobordism. MATHEMATICA SCANDINAVICA, [S. l.], v. 30, p. 223–226, 1972. DOI: 10.7146/math.scand.a-11077. Disponível em: https://tidsskrift.dk/math/article/view/11077. Acesso em: 14 aug. 2026.