@article{04136511, title = {Time-evolution of a caustic.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {11}, year = {1988}, pages = {805-810}, doi = {10.1155/S0161171288000973}, zbl = {0694.35103}, language = {en}, url = {http://dml.mathdoc.fr/item/04136511} }
Ari, Nasit; Gorman, Arthur D. Time-evolution of a caustic.. International Journal of Mathematics and Mathematical Sciences, Tome 11 (1988) pp. 805-810. doi : 10.1155/S0161171288000973. http://gdmltest.u-ga.fr/item/04136511/