@article{1178242638,
author = {Chavel, Isaac},
title = {On non-Riemannian sectional curvature in Riemannian homogeneous spaces},
journal = {Tohoku Math. J. (2)},
volume = {23},
number = {4},
year = {1971},
pages = { 169-172},
language = {en},
url = {http://dml.mathdoc.fr/item/1178242638}
}
Chavel, Isaac. On non-Riemannian sectional curvature in Riemannian homogeneous spaces. Tohoku Math. J. (2), Tome 23 (1971) no. 4, pp. 169-172. http://gdmltest.u-ga.fr/item/1178242638/