@article{MZM_2010_87_5_a10,
     author = {A. M. Bikchentaev},
     title = {On a {Lemma} of {Berezin}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {787--791},
     publisher = {mathdoc},
     volume = {87},
     number = {5},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2010_87_5_a10/}
}