@article{AIHPA_1976__24_3_243_0,
     author = {Dubois, Jean-Guy and Dufour, Jean-Paul and Stanek, Oleg},
     title = {La th\'eorie des catastrophes. {III.} {Caustiques} de l'optique g\'eom\'etrique},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {243--260},
     publisher = {Gauthier-Villars},
     volume = {24},
     number = {3},
     year = {1976},
     mrnumber = {426022},
     zbl = {0407.58014},
     language = {fr},
     url = {http://www.numdam.org/item/AIHPA_1976__24_3_243_0/}
}