@article{DAN_1990_312_3_a5,
     author = {A. A. Samarskii and V. L. Makarov},
     title = {Realization of exact three-point difference schemes for},
     journal = {Doklady Akademii Nauk},
     pages = {538--543},
     year = {1990},
     volume = {312},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_312_3_a5/}
}