@article{DAN_1987_297_5_a9,
     author = {M. S. Syavavko},
     title = {Fractional-analytic approximation of an evolution operator},
     journal = {Doklady Akademii Nauk},
     pages = {1065--1067},
     publisher = {mathdoc},
     volume = {297},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_5_a9/}
}