@article{1200771282, author = {Koiso, Norihito}, title = {Nondeformability of Einstein metrics}, journal = {Osaka J. Math.}, volume = {15}, number = {1}, year = {1978}, pages = { 419-433}, language = {en}, url = {http://dml.mathdoc.fr/item/1200771282} }
Koiso, Norihito. Nondeformability of Einstein metrics. Osaka J. Math., Tome 15 (1978) no. 1, pp. 419-433. http://gdmltest.u-ga.fr/item/1200771282/