Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1972__47_139517, author = {John R. Harper}, title = {Homotopy {Groups} of {H-Spaces} {I}}, journal = {Commentarii mathematici Helvetici}, pages = {311--331}, publisher = {mathdoc}, volume = {47}, year = {1972}, zbl = {0253.55009}, url = {http://geodesic.mathdoc.fr/item/CMH_1972__47_139517/} }
John R. Harper. Homotopy Groups of H-Spaces I. Commentarii mathematici Helvetici, Tome 47 (1972), pp. 311-331. http://geodesic.mathdoc.fr/item/CMH_1972__47_139517/