%0 Journal Article %A Khoury, Joseph %T A Note on Elementary Derivations %J Serdica Mathematical Journal %D 2004 %P 549-570 %V 30 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_2004_30_4_a6/ %G en %F SMJ2_2004_30_4_a6