%0 Journal Article
%A Oswald, P.
%T On the boundedness of the mapping $f\to |f|$ in Besov spaces
%J Commentationes Mathematicae Universitatis Carolinae
%D 1992
%P 57-66
%V 33
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1992__33_1_a7/
%G en
%F CMUC_1992__33_1_a7