@article{FAA_1999_33_2_a7,
     author = {A. G. Baskakov},
     title = {An {Abstract} {Analog} of the {Krylov{\textendash}Bogolyubov} {Transformation} in the {Perturbation} {Theory} of {Linear} {Operators}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {76--80},
     year = {1999},
     volume = {33},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1999_33_2_a7/}
}