Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{CMH_1960__34_139197, author = {B. Eckmann and P.J. Hilton}, title = {Homotopy {Groups} of {Maps} and {Exact} {Sequences.}}, journal = {Commentarii mathematici Helvetici}, pages = {271--304}, publisher = {mathdoc}, volume = {34}, year = {1960}, zbl = {0099.17904}, url = {http://geodesic.mathdoc.fr/item/CMH_1960__34_139197/} }
B. Eckmann; P.J. Hilton. Homotopy Groups of Maps and Exact Sequences.. Commentarii mathematici Helvetici, Tome 34 (1960), pp. 271-304. http://geodesic.mathdoc.fr/item/CMH_1960__34_139197/