@article{AA_1998_10_6_a6,
     author = {A. B. Pushnitskii},
     title = {Integral estimates for the spectral shift function},
     journal = {Algebra i analiz},
     pages = {198--233},
     year = {1998},
     volume = {10},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1998_10_6_a6/}
}