@article{01267659, title = {The Schl\"afli formula in Einstein manifolds with boundary.}, journal = {Electronic Research Announcements of the American Mathematical Society [electronic only]}, volume = {5}, year = {1999}, pages = {18-23}, doi = {10.1090/S1079-6762-99-00057-8}, zbl = {0910.53036}, language = {en}, url = {http://dml.mathdoc.fr/item/01267659} }
Rivin, Igor; Schlenker, Jean-Marc. The Schläfli formula in Einstein manifolds with boundary.. Electronic Research Announcements of the American Mathematical Society [electronic only], Tome 5 (1999) pp. 18-23. doi : 10.1090/S1079-6762-99-00057-8. http://gdmltest.u-ga.fr/item/01267659/