@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/