@article{MSH_1978__64__9_0,
     author = {Petitot, J.},
     title = {Caustiques et catastrophes},
     journal = {Math\'ematiques et sciences humaines},
     pages = {9--26},
     publisher = {Ecole Pratique des hautes \'etudes, Centre de math\'ematique sociale et de statistique},
     volume = {64},
     year = {1978},
     mrnumber = {538881},
     zbl = {0419.58006},
     language = {fr},
     url = {http://archive.numdam.org/item/MSH_1978__64__9_0/}
}