%0 Journal Article %A Miroslav Doupovec %T Natural transformations between T²₁T*M and T*T²₁M %J Annales Polonici Mathematici %D 1991 %P 67-77 %V 56 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-56-1-67-77/ %R 10.4064/ap-56-1-67-77 %G en %F 10_4064_ap_56_1_67_77