%0 Journal Article %A Włodzimierz M. Mikulski %T The natural operators $T^{(0,0)}\rightsquigarrow T^{(1,1)}T^{(r)}$ %J Colloquium Mathematicum %D 2003 %P 5-16 %V 96 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm96-1-2/ %R 10.4064/cm96-1-2 %G en %F 10_4064_cm96_1_2