@article{JRAM_1993__440_153533,
     author = {F. Campana and H. Flenner},
     title = {Projective threefolds containing a smooth rational surface with ample normal bundle.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {77--98},
     publisher = {mathdoc},
     volume = {440},
     year = {1993},
     zbl = {0769.14014},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1993__440_153533/}
}