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@article{CMH_1963__38_139277, author = {B. Eckmann and P.J. Hilton}, title = {Unions and intersectons in {Homotopy} {Theory.}}, journal = {Commentarii mathematici Helvetici}, pages = {293--307}, publisher = {mathdoc}, volume = {38}, year = {1963}, zbl = {0126.38903}, url = {http://geodesic.mathdoc.fr/item/CMH_1963__38_139277/} }
B. Eckmann; P.J. Hilton. Unions and intersectons in Homotopy Theory.. Commentarii mathematici Helvetici, Tome 38 (1963), pp. 293-307. http://geodesic.mathdoc.fr/item/CMH_1963__38_139277/