@article{CTGDC_1971__12_1_57_0,
     author = {Bowshell, R. A.},
     title = {Abstract velocity functors},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {57--91},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {12},
     number = {1},
     year = {1971},
     mrnumber = {287588},
     zbl = {0218.53048},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1971__12_1_57_0/}
}