@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}, zbl = {0201.25904}, mrnumber = {296926}, language = {fr}, url = {http://www.numdam.org/item/CTGDC_1969__11_4_387_0/} }