@article{GDZPPN002340542,
title = {Components of the stack of torsion-free sheaves of rank 2 on ruled surfaces.},
journal = {Mathematische Annalen},
volume = {302},
year = {1995},
pages = {699-716},
zbl = {0820.14029},
url = {http://dml.mathdoc.fr/item/GDZPPN002340542}
}
Walter, Charles H. Components of the stack of torsion-free sheaves of rank 2 on ruled surfaces.. Mathematische Annalen, Tome 302 (1995) pp. 699-716. http://gdmltest.u-ga.fr/item/GDZPPN002340542/