%0 Journal Article %A Tunaru, Radu %T An extension of invertibility of Hammerstein-type operators %J Czechoslovak Mathematical Journal %D 1999 %P 341-346 %V 49 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_1999__49_2_a9/ %G en %F CMJ_1999__49_2_a9