@article{FAA_1971_5_1_a16,
     author = {I. E. Ovcharenko},
     title = {On the expansion of hermitian forms and symmetric operators},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {89--90},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1971_5_1_a16/}
}