@article{DAN_1989_304_6_a11,
     author = {I. I. Vorovich},
     title = {Solvability of boundary value problems in the nonlinear theory of},
     journal = {Doklady Akademii Nauk},
     pages = {1329--1332},
     publisher = {mathdoc},
     volume = {304},
     number = {6},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_304_6_a11/}
}