@article{1183485656,
author = {Graustein, W. C.},
title = {Note on a certain type of ruled surface},
journal = {Bull. Amer. Math. Soc.},
volume = {29},
number = {10},
year = {1923},
pages = { 341-344},
language = {en},
url = {http://dml.mathdoc.fr/item/1183485656}
}
Graustein, W. C. Note on a certain type of ruled surface. Bull. Amer. Math. Soc., Tome 29 (1923) no. 10, pp. 341-344. http://gdmltest.u-ga.fr/item/1183485656/