%0 Journal Article %A Ohbuchi, Akira %T On the Difference of 4-Gonal Linear Systems on some Curves %J Serdica Mathematical Journal %D 1997 %P 59-68 %V 23 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SMJ2_1997_23_1_a4/ %G en %F SMJ2_1997_23_1_a4