@article{DE_1994_30_5_a9,
     author = {A. V. Bitsadze},
     title = {On the theory of quasilinear partial differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {814--820},
     publisher = {mathdoc},
     volume = {30},
     number = {5},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_5_a9/}
}