@article{IVM_1982_10_a6,
     author = {I. B. Medvinskaya},
     title = {Existence of a~nonnegative solution of boundary value problems for elliptic quasilinear systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {40--50},
     publisher = {mathdoc},
     number = {10},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1982_10_a6/}
}