@article{1029002001, author = {Fegan, Howard D. and Millman, Richard S.}, title = {Quadrants of Riemannian metrics.}, journal = {Michigan Math. J.}, volume = {25}, number = {1}, year = {1978}, pages = { 3-7}, language = {en}, url = {http://dml.mathdoc.fr/item/1029002001} }
Fegan, Howard D.; Millman, Richard S. Quadrants of Riemannian metrics.. Michigan Math. J., Tome 25 (1978) no. 1, pp. 3-7. http://gdmltest.u-ga.fr/item/1029002001/