@article{1183415801,
author = {Snyder, Virgil},
title = {Asymptotic lines on ruled surfaces having two rectilinear directrices},
journal = {Bull. Amer. Math. Soc.},
volume = {6},
number = {3},
year = {1899},
pages = { 343-353},
language = {en},
url = {http://dml.mathdoc.fr/item/1183415801}
}
Snyder, Virgil. Asymptotic lines on ruled surfaces having two rectilinear directrices. Bull. Amer. Math. Soc., Tome 6 (1899) no. 3, pp. 343-353. http://gdmltest.u-ga.fr/item/1183415801/