@article{GDZPPN002229358, title = {Smooth surfaces of degree 9 in G(1,3).}, journal = {Manuscripta mathematica}, volume = {61}, year = {1988}, pages = {417-436}, zbl = {0673.14026}, url = {http://dml.mathdoc.fr/item/GDZPPN002229358} }
Verra, Alessandro. Smooth surfaces of degree 9 in G(1,3).. Manuscripta mathematica, Tome 61 (1988) pp. 417-436. http://gdmltest.u-ga.fr/item/GDZPPN002229358/