PEDERSEN, Erik Kjaer. Smoothing H-spaces. Mathematica Scandinavica, Berkeley, CA, United States, v. 43, p. 185–196, 1978. DOI: 10.7146/math.scand.a-11774. Disponível em: https://journals.msp.org/mscand/article/view/1872. Acesso em: 25 jul. 2026.