%0 Journal Article
%A Niels Jacob
%T Commutator Estimates for Pseudodifferential Operators with Negative Definite Functions as Symbols.
%J Forum mathematicum
%D 1990
%P 155-162
%V 2
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/FORUM_1990__2_3_141636/
%F FORUM_1990__2_3_141636