@article{SM_2020_211_3_a2,
     author = {D. V. Tunitsky},
     title = {Multivalued solutions of hyperbolic {Monge-Amp\`ere} equations: solvability, integrability, approximation},
     journal = {Sbornik. Mathematics},
     pages = {373--421},
     year = {2020},
     volume = {211},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2020_211_3_a2/}
}