@article{DAN_1996_351_1_a0,
     author = {A. K. Gushchin and V. P. Mikhailov},
     title = {On the unique solvability of nonlocal problems for an elliptic},
     journal = {Doklady Akademii Nauk},
     pages = {7--8},
     publisher = {mathdoc},
     volume = {351},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_351_1_a0/}
}