@article{IM_1989__96_1_143680,
     author = {Robert Friedman},
     title = {Rank two vector bundles over regular elliptic surfaces.},
     journal = {Inventiones mathematicae},
     pages = {283--332},
     publisher = {mathdoc},
     volume = {96},
     number = {1},
     year = {1989},
     zbl = {0671.14006},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__96_1_143680/}
}