PEDERSEN, E. K. Smoothing H-spaces II. MATHEMATICA SCANDINAVICA, [S. l.], v. 46, p. 216–222, 1980. DOI: 10.7146/math.scand.a-11864. Disponível em: https://www.mscand.dk/article/view/11864. Acesso em: 5 may. 2024.