@article{CTGDC_1967__9_2_181_0,
     author = {Ganea, Tudor},
     title = {Sur quelques invariants num\'eriques du type d'homotopie},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {181--241},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {9},
     number = {2},
     year = {1967},
     mrnumber = {230308},
     zbl = {0162.55101},
     language = {fr},
     url = {http://www.numdam.org/item/CTGDC_1967__9_2_181_0/}
}