@article{FAA_1967_1_2_a2,
     author = {V. \`E. Katsnelson},
     title = {Conditions under which systems of eigenvectors of some classes of operators form a basis},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {39--51},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1967_1_2_a2/}
}