@article{1256050808, author = {Naveira, A. M.}, title = {On the higher order sectional curvatures}, journal = {Illinois J. Math.}, volume = {19}, number = {4}, year = {1975}, pages = { 165-172}, language = {en}, url = {http://dml.mathdoc.fr/item/1256050808} }
Naveira, A. M. On the higher order sectional curvatures. Illinois J. Math., Tome 19 (1975) no. 4, pp. 165-172. http://gdmltest.u-ga.fr/item/1256050808/