@article{GDZPPN002221535, title = {Unisecant curves on a general ruled surface.}, journal = {Manuscripta mathematica}, volume = {25}, year = {1978}, pages = {169-178}, zbl = {0405.14004}, url = {http://dml.mathdoc.fr/item/GDZPPN002221535} }
Ghione, Franco; Lascu, Alexandru T. Unisecant curves on a general ruled surface.. Manuscripta mathematica, Tome 25 (1978) pp. 169-178. http://gdmltest.u-ga.fr/item/GDZPPN002221535/