@article{FAA_1980_14_4_a0,
     author = {T. Ya. Azizov and S. A. Khoroshavin},
     title = {Invariant subspaces of operators which act in a space with indefinite metric},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {1--7},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1980_14_4_a0/}
}