@article{ASENS_1993_4_26_3_281_0,
     author = {Lychagin, V. V. and Rubtsov, V. N. and Chekalov, I. V.},
     title = {A classification of {Monge-Amp\`ere} equations},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {281--308},
     publisher = {Elsevier},
     volume = {Ser. 4, 26},
     number = {3},
     year = {1993},
     doi = {10.24033/asens.1673},
     mrnumber = {94c:58229},
     zbl = {0789.58078},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.1673/}
}