%0 Journal Article %A G. Megyesi %T Bogomolov instability of higher rank sheaves on surfaces in characteristic p. %J Mathematische Annalen %D 1995 %P 529-538 %V 301 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1995__301_4_165306/ %F MAN_1995__301_4_165306