@article{ZVMMF_1968_8_1_a5,
     author = {Yu. K. Dem'yanovich},
     title = {Convergence rate estimates for some projection methods of solving elliptic equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {79--96},
     publisher = {mathdoc},
     volume = {8},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1968_8_1_a5/}
}