@article{FAA_2000_34_3_a6,
     author = {E. I. Berezhnoi and A. A. Perfil'ev},
     title = {A {Sharp} {Extrapolation} {Theorem} for {Operators}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {66--68},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2000_34_3_a6/}
}