%0 Journal Article
%A Martínez, Celso
%A Sanz, Miguel
%A Redondo, Antonia
%T Fractional Powers of Almost Non-Negative Operators
%J Fractional calculus and applied analysis
%D 2005
%P 201-230
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FCAA_2005_8_2_a6/
%G en
%F FCAA_2005_8_2_a6