@article{DAN_1986_287_1_a8,
     author = {H. \.Zo{\l}\k{a}dek},
     title = {Invariant subspaces of an additive cluster operator},
     journal = {Doklady Akademii Nauk},
     pages = {41--44},
     publisher = {mathdoc},
     volume = {287},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_287_1_a8/}
}