@article{DAN_1979_247_3_a7,
     author = {S. I. Lyashko},
     title = {A method of finding an approximate solution of the {Cauchy} problem with an operator coefficient of hyperbolic type},
     journal = {Doklady Akademii Nauk},
     pages = {546--549},
     publisher = {mathdoc},
     volume = {247},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_247_3_a7/}
}