%0 Journal Article
%A M. Sh. Birman
%A M. Z. Solomyak
%T Estimates for the difference of the fractional powers of self-adjoint operators under unbounded perturbations
%J Zapiski Nauchnykh Seminarov POMI
%D 1989
%P 120-145
%V 178
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1989_178_a4/
%G ru
%F ZNSL_1989_178_a4