@article{MAN_1983__265_163818,
     author = {J. Eric Brosius},
     title = {Rank-2 {Vector} {Bundles} on a {Ruled} {Surface.} {I.}},
     journal = {Mathematische Annalen},
     pages = {155--168},
     publisher = {mathdoc},
     volume = {265},
     year = {1983},
     zbl = {0503.55012},
     url = {http://geodesic.mathdoc.fr/item/MAN_1983__265_163818/}
}