@article{1029004684, author = {Wu, Jyh Yang}, title = {Two metric invariants for Riemannian manifolds.}, journal = {Michigan Math. J.}, volume = {40}, number = {1}, year = {1993}, pages = { 201-208}, language = {en}, url = {http://dml.mathdoc.fr/item/1029004684} }
Wu, Jyh Yang. Two metric invariants for Riemannian manifolds.. Michigan Math. J., Tome 40 (1993) no. 1, pp. 201-208. http://gdmltest.u-ga.fr/item/1029004684/