@article{DAN_1974_215_5_a2,
     author = {V. V. Vasin and V. P. Tanana},
     title = {Necessary and sufficient conditions for convergence of projection methods for linear unstable problems},
     journal = {Doklady Akademii Nauk},
     pages = {1032--1034},
     publisher = {mathdoc},
     volume = {215},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_215_5_a2/}
}