ZABRODSKY, A. The Classification of Simply Connected $H$-Spaces with Three Cells II. MATHEMATICA SCANDINAVICA, [S. l.], v. 30, p. 211–222, 1972. DOI: 10.7146/math.scand.a-11076. Disponível em: https://www.mscand.dk/article/view/11076. Acesso em: 4 may. 2024.