@article{DE_1993_29_12_a15,
     author = {D. V. Tunitsky},
     title = {Multivalued solutions of hyperbolic {Monge--Amp\`ere} equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2178--2189},
     publisher = {mathdoc},
     volume = {29},
     number = {12},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_12_a15/}
}