@article{DAN_1996_346_3_a6,
     author = {V. I. Drobyshevich},
     title = {On the convergence of methods with different time steps in},
     journal = {Doklady Akademii Nauk},
     pages = {315--318},
     publisher = {mathdoc},
     volume = {346},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_346_3_a6/}
}