@article{DE_1994_30_6_a16,
     author = {G. I. Laptev},
     title = {The first boundary value problem for second-order quasilinear elliptic equations with double degeneration},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1057--1068},
     publisher = {mathdoc},
     volume = {30},
     number = {6},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_6_a16/}
}