@article{1047477111,
author = {Joets, Alain and Ribotta, Roland},
title = {Caustique de la surface ellipso\"\i dale \`a trois dimensions},
journal = {Experiment. Math.},
volume = {8},
number = {4},
year = {1999},
pages = { 49-55},
language = {en},
url = {http://dml.mathdoc.fr/item/1047477111}
}
Joets, Alain; Ribotta, Roland. Caustique de la surface ellipsoïdale à trois dimensions. Experiment. Math., Tome 8 (1999) no. 4, pp. 49-55. http://gdmltest.u-ga.fr/item/1047477111/