@article{CTGDC_1969__11_4_387_0,
     author = {Bednarz, Nadine},
     title = {Noyaux d'esp\`eces de structures. {Applications} covariantes topologiques},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {387--403},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {11},
     number = {4},
     year = {1969},
     mrnumber = {296926},
     zbl = {0201.25904},
     language = {fr},
     url = {http://archive.numdam.org/item/CTGDC_1969__11_4_387_0/}
}