@article{DAN_1957_114_4_a4,
     author = {V. K. Zakharov},
     title = {The first boundary problem for an elliptical type of equations of order four, degenerating at the domain boundary},
     journal = {Doklady Akademii Nauk},
     pages = {694--697},
     publisher = {mathdoc},
     volume = {114},
     number = {4},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_4_a4/}
}