@article{JRAM_1995__469_153775,
     author = {Geng Xu},
     title = {Ample line bundles on smooth surfaces.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {199--210},
     publisher = {mathdoc},
     volume = {469},
     year = {1995},
     zbl = {0833.14028},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1995__469_153775/}
}