ZABRODSKY, A. The Classification of Simply Connected $H$-Spaces with Three Cells II. Mathematica Scandinavica, Berkeley, CA, United States, v. 30, p. 211–222, 1972. DOI: 10.7146/math.scand.a-11076. Disponível em: https://journals.msp.org/mscand/article/view/2246. Acesso em: 25 jul. 2026.