@article{CTGDC_1974__15_2_145_0,
     author = {Lavendhomme, R.},
     title = {Variations sur un th\`eme de {Yoneda}},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {145--155},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {15},
     number = {2},
     year = {1974},
     mrnumber = {387370},
     zbl = {0342.18002},
     language = {fr},
     url = {http://www.numdam.org/item/CTGDC_1974__15_2_145_0/}
}