@article{ZVMMF_1966_6_5_a5,
     author = {N. S. Bakhvalov},
     title = {On the convergence of a relaxation method with natural constraints on the elliptic operator},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {861--883},
     publisher = {mathdoc},
     volume = {6},
     number = {5},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1966_6_5_a5/}
}