Voir la notice de l'article provenant de la source Math-Net.Ru
@article{FAA_1986_20_3_a5, author = {Yu. V. Chekanov}, title = {Caustics in geometrical optics}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {66--69}, publisher = {mathdoc}, volume = {20}, number = {3}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1986_20_3_a5/} }
Yu. V. Chekanov. Caustics in geometrical optics. Funkcionalʹnyj analiz i ego priloženiâ, Tome 20 (1986) no. 3, pp. 66-69. http://geodesic.mathdoc.fr/item/FAA_1986_20_3_a5/