@article{RM_1974_29_6_a17,
     author = {G. M. Feldman},
     title = {The spectrum of contractions that depend analytically on a~parameter},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1974},
     volume = {29},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1974_29_6_a17/}
}