%0 Journal Article
%A Winfried Sickel
%T Superposition of functions in Sobolev spaces of fractional order. A survey
%J Banach Center Publications
%D 1992
%P 481-497
%V 27
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/-27-2-481-497/
%R 10.4064/-27-2-481-497
%G en
%F 10_4064__27_2_481_497