BAAS, Nils A.; MADSEN, Ib. On the Realization of Certain Modules over the Steenrod Algebra. MATHEMATICA SCANDINAVICA, [S. l.], v. 31, p. 220–224, 1972. DOI: 10.7146/math.scand.a-11427. Disponível em: https://www.mscand.dk/article/view/11427. Acesso em: 5 dec. 2025.