@article{GDZPPN002063328, title = {The values of sectional curvature in indefinite metrics.}, journal = {Commentarii mathematici Helvetici}, volume = {54}, year = {1979}, pages = {173-176}, zbl = {0393.53022}, url = {http://dml.mathdoc.fr/item/GDZPPN002063328} }
Kulkarni, R.S. The values of sectional curvature in indefinite metrics.. Commentarii mathematici Helvetici, Tome 54 (1979) pp. 173-176. http://gdmltest.u-ga.fr/item/GDZPPN002063328/