%0 Journal Article %A Katsumi Nomizu %A Takeshi Sasaki %T On a Theorem of Chern and Terng on Affine Surfaces. %J Manuscripta mathematica %D 1990 %P 303-308 %V 66 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1990__66_1_155475/ %F MM2_1990__66_1_155475