@article{IM_1976__36_142416,
     author = {Richard G. Swan and Pavaman Murthy},
     title = {Vector {Bundles} over {Affine} {Surfaces.}},
     journal = {Inventiones mathematicae},
     pages = {125--166},
     publisher = {mathdoc},
     volume = {36},
     year = {1976},
     url = {http://geodesic.mathdoc.fr/item/IM_1976__36_142416/}
}