@article{GDZPPN002058308,
title = {Unions and intersectons in Homotopy Theory.},
journal = {Commentarii mathematici Helvetici},
volume = {38},
year = {1963},
pages = {293-307},
zbl = {0126.38903},
url = {http://dml.mathdoc.fr/item/GDZPPN002058308}
}
Eckmann, B.; Hilton, P.J. Unions and intersectons in Homotopy Theory.. Commentarii mathematici Helvetici, Tome 38 (1963) pp. 293-307. http://gdmltest.u-ga.fr/item/GDZPPN002058308/