@article{GDZPPN002326795, title = {The Tangent Bundle of a Ruled Surface.}, journal = {Mathematische Annalen}, volume = {270}, year = {1985}, pages = {527-548}, zbl = {0541.14035}, url = {http://dml.mathdoc.fr/item/GDZPPN002326795} }
Ganong, R.; Russell, P. The Tangent Bundle of a Ruled Surface.. Mathematische Annalen, Tome 270 (1985) pp. 527-548. http://gdmltest.u-ga.fr/item/GDZPPN002326795/