@article{FAA_1971_5_3_a9,
     author = {B. L. Kogan},
     title = {Double completeness of the system of eigenfunctions and associated functions of the regge problem},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {70--74},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1971_5_3_a9/}
}