@article{MZM_1977_21_3_a10,
     author = {G. V. Radzievskii},
     title = {Completeness of root vectors of a {Keldysh} pencil perturbed by an analytic operator-valued function $S(\lambda)$ with $S(\infty)=0$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {391--398},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_21_3_a10/}
}