@article{DAN_1958_121_4_a1,
     author = {V. S. Vinogradov},
     title = {On certain boundary value problems for quasilinear elliptical systems of first order in the plane},
     journal = {Doklady Akademii Nauk},
     pages = {579--581},
     publisher = {mathdoc},
     volume = {121},
     number = {4},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_121_4_a1/}
}