@article{ZNSL_1987_163_a2,
     author = {A. F. Vakulenko},
     title = {On a variant of commutator estimates in spectral theory},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {29--36},
     year = {1987},
     volume = {163},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_163_a2/}
}