@article{DE_1974_10_1_a21,
     author = {V. E. Shatalov},
     title = {The $\zeta $-function in an elliptic {Sobolev} problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {171--173},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_1_a21/}
}