@article{FAA_2023_57_2_a8, author = {M. M. Malamud}, title = {On the {Birman} problem in the theory of nonnegative symmetric operators with compact inverse}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {111--116}, publisher = {mathdoc}, volume = {57}, number = {2}, year = {2023}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_2023_57_2_a8/} }