%0 Journal Article %A Kundu, N. K. %T On symmetric derivatives and on properties of Zahorski %J Czechoslovak Mathematical Journal %D 1976 %P 154-160 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101382/ %R 10.21136/CMJ.1976.101382 %G en %F 10_21136_CMJ_1976_101382