@article{1029001525,
author = {Milnor, Tilla Klotz},
title = {The curvature of $\alpha\roman I+\beta\roman I\roman I+\lambda\roman{III}$ on a surface in a $3$-manifold of constant curvature.},
journal = {Michigan Math. J.},
volume = {22},
number = {3},
year = {1976},
pages = { 247-255},
language = {en},
url = {http://dml.mathdoc.fr/item/1029001525}
}
Milnor, Tilla Klotz. The curvature of $\alpha\roman I+\beta\roman I\roman I+\lambda\roman{III}$ on a surface in a $3$-manifold of constant curvature.. Michigan Math. J., Tome 22 (1976) no. 3, pp. 247-255. http://gdmltest.u-ga.fr/item/1029001525/