@article{GDZPPN002230542, title = {On a Theorem of Chern and Terng on Affine Surfaces.}, journal = {Manuscripta mathematica}, volume = {67}, year = {1990}, pages = {303-308}, zbl = {0699.53008}, url = {http://dml.mathdoc.fr/item/GDZPPN002230542} }
Nomizu, Katsumi; Sasaki, Takeshi. On a Theorem of Chern and Terng on Affine Surfaces.. Manuscripta mathematica, Tome 67 (1990) pp. 303-308. http://gdmltest.u-ga.fr/item/GDZPPN002230542/