@article{MAN_1996__306_3_165470,
     author = {Carmen Schuhmann},
     title = {Mapping threefolds onto three-dimensional quadrics.},
     journal = {Mathematische Annalen},
     pages = {571--582},
     publisher = {mathdoc},
     volume = {306},
     number = {3},
     year = {1996},
     zbl = {0873.14035},
     url = {http://geodesic.mathdoc.fr/item/MAN_1996__306_3_165470/}
}