@article{FAA_2010_44_4_a6,
     author = {A. B. Pushnitskii},
     title = {An {Integer-Valued} {Version} of the {Birman--Krein} {Formula}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {80--86},
     publisher = {mathdoc},
     volume = {44},
     number = {4},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2010_44_4_a6/}
}