@article{IM_1986__86_143399,
     author = {C. Okonek and A. de Van de Yen},
     title = {Stahle bundles and differentiable structures on certain elliptic surfaces.},
     journal = {Inventiones mathematicae},
     pages = {357--370},
     publisher = {mathdoc},
     volume = {86},
     year = {1986},
     zbl = {0613.14018},
     url = {http://geodesic.mathdoc.fr/item/IM_1986__86_143399/}
}