@article{1103904565, author = {Friedman, John L.}, title = {Ergosphere instability}, journal = {Comm. Math. Phys.}, volume = {58}, number = {1}, year = {1978}, pages = { 243-255}, language = {en}, url = {http://dml.mathdoc.fr/item/1103904565} }
Friedman, John L. Ergosphere instability. Comm. Math. Phys., Tome 58 (1978) no. 1, pp. 243-255. http://gdmltest.u-ga.fr/item/1103904565/