@article{FAA_1967_1_3_a2,
     author = {L. A. Dikii},
     title = {Double completeness of a system of characteristic functions arising in a problem of mathematical physics},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {24--32},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1967_1_3_a2/}
}