%0 Journal Article %A Acharya, Mukti %A Singh, Tarkeshwar %T Graceful signed graphs %J Czechoslovak Mathematical Journal %D 2004 %P 291-302 %V 54 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2004__54_2_a2/ %G en %F CMJ_2004__54_2_a2