@article{DAN_1989_305_3_a6,
     author = {Yu. I. Shokin and A. I. Urusov and V. N. Yanshin},
     title = {On the analysis of the stability of two-layer difference schemes},
     journal = {Doklady Akademii Nauk},
     pages = {543--545},
     publisher = {mathdoc},
     volume = {305},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_305_3_a6/}
}