@article{MZM_2011_90_3_a9,
     author = {E. A. Sevost'yanov},
     title = {On {Quasilinear} {Beltrami-Type} {Equations} with {Degeneration}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {445--453},
     publisher = {mathdoc},
     volume = {90},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_3_a9/}
}