@article{DAN_1990_311_3_a5,
     author = {A. P. Soldatov},
     title = {A general boundary value problem for elliptic systems},
     journal = {Doklady Akademii Nauk},
     pages = {539--543},
     publisher = {mathdoc},
     volume = {311},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_3_a5/}
}