@article{FPM_2010_16_2_a7,
     author = {L. N. Orlova},
     title = {The geometry of a~quasilinear system of two partial differential equations containing the first and second partial derivatives of two functions in two independent variables},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {67--84},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2010_16_2_a7/}
}