@article{JRAM_1981__329_183535,
     author = {Klaus Hulek},
     title = {On the deformation of orthogonal bundles over the projective line.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {52--57},
     publisher = {mathdoc},
     volume = {329},
     year = {1981},
     zbl = {0462.14004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1981__329_183535/}
}