@article{DAN_1960_131_1_a3,
     author = {Yu. I. Lyubich and V. I. Matsaev},
     title = {On the spectral theory of linear operators in {Banach} spaces},
     journal = {Doklady Akademii Nauk},
     pages = {21--23},
     publisher = {mathdoc},
     volume = {131},
     number = {1},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_1_a3/}
}