@article{AA_1989_1_5_a5,
     author = {V. A. Kozlov and V. G. Maz'ya},
     title = {Iterative procedures for solving ill-posed boundary value problems that preserve the differential equations},
     journal = {Algebra i analiz},
     pages = {144--170},
     year = {1989},
     volume = {1},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1989_1_5_a5/}
}