@article{TSG_2001-2002__20__131_0,
     author = {Charlot, Gr\'egoire},
     title = {M\'etriques sous-riemanniennes de quasi-contact : forme normale et caustique},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {131--137},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {20},
     year = {2001-2002},
     mrnumber = {1987638},
     zbl = {1035.53037},
     language = {fr},
     url = {http://archive.numdam.org/item/TSG_2001-2002__20__131_0/}
}