@article{MAN_1995__301_4_165306,
     author = {G. Megyesi},
     title = {Bogomolov instability of higher rank sheaves on surfaces in characteristic p.},
     journal = {Mathematische Annalen},
     pages = {529--538},
     publisher = {mathdoc},
     volume = {301},
     number = {4},
     year = {1995},
     zbl = {0820.14028},
     url = {http://geodesic.mathdoc.fr/item/MAN_1995__301_4_165306/}
}