@article{1103905492, author = {Jang, Pong Soo}, title = {On positivity of mass for black hole space-times}, journal = {Comm. Math. Phys.}, volume = {64}, number = {3}, year = {1979}, pages = { 257-266}, language = {en}, url = {http://dml.mathdoc.fr/item/1103905492} }
Jang, Pong Soo. On positivity of mass for black hole space-times. Comm. Math. Phys., Tome 64 (1979) no. 3, pp. 257-266. http://gdmltest.u-ga.fr/item/1103905492/