%0 Journal Article %A J. Kurek %A W. M. Mikulski %T The natural linear operators $T^*\rightsquigarrow TT^{(r)}$ %J Colloquium Mathematicum %D 2003 %P 37-47 %V 95 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm95-1-3/ %R 10.4064/cm95-1-3 %G en %F 10_4064_cm95_1_3