%0 Journal Article %A Ćirić, Ljubomir %T On a generalization of a Greguš fixed point theorem %J Czechoslovak Mathematical Journal %D 2000 %P 449-458 %V 50 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2000__50_3_a0/ %G en %F CMJ_2000__50_3_a0