@article{DAN_1966_171_5_a5,
     author = {S. G. Krein},
     title = {Correctness of the {Cauchy} problem and the analyticity of solutions of the evolution equation},
     journal = {Doklady Akademii Nauk},
     pages = {1033--1036},
     publisher = {mathdoc},
     volume = {171},
     number = {5},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_171_5_a5/}
}