@article{GDZPPN002261154,
title = {Associate Surfaces},
journal = {Mathematische Annalen},
volume = {62},
year = {1906},
pages = {504-538},
zbl = {37.0637.03},
url = {http://dml.mathdoc.fr/item/GDZPPN002261154}
}
Eisenhart, L.P. Associate Surfaces. Mathematische Annalen, Tome 62 (1906) pp. 504-538. http://gdmltest.u-ga.fr/item/GDZPPN002261154/