@article{IM2_2001_65_6_a5,
     author = {D. V. Tunitsky},
     title = {Monge--Amp\'ere equations and characteristic connection functors},
     journal = {Izvestiya. Mathematics },
     pages = {1243--1290},
     publisher = {mathdoc},
     volume = {65},
     number = {6},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2001_65_6_a5/}
}