@article{DAN_1964_154_3_a2,
     author = {M. A. Gol'dman and S. N. Krachkovskii},
     title = {Invariance of certain spaces associated with the operator $A-\lambda I$},
     journal = {Doklady Akademii Nauk},
     pages = {500--502},
     publisher = {mathdoc},
     volume = {154},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_3_a2/}
}