PEDERSEN, Erik Kjaer. Smoothing H-spaces II. Mathematica Scandinavica, Berkeley, CA, United States, v. 46, p. 216–222, 1980. DOI: 10.7146/math.scand.a-11864. Disponível em: https://journals.msp.org/mscand/article/view/1788. Acesso em: 25 jul. 2026.