@article{FAA_1995_29_3_a11,
     author = {I. S. Kats},
     title = {Criterion for {Discreteness} of the {Spectrum} of a {Singular} {Canonical} {System}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {75--78},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1995_29_3_a11/}
}