%0 Journal Article %A Sickel, Winfried %T On boundedness of superposition operators in spaces of Triebel-Lizorkin type %J Czechoslovak Mathematical Journal %D 1989 %P 323-347 %V 39 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102305/ %R 10.21136/CMJ.1989.102305 %G en %F 10_21136_CMJ_1989_102305