@article{1103841392,
author = {Massa, Enrico},
title = {On the mathematical structure of Einstein's equations in mixed initial and boundary value problems},
journal = {Comm. Math. Phys.},
volume = {12},
number = {1},
year = {1969},
pages = { 246-252},
language = {en},
url = {http://dml.mathdoc.fr/item/1103841392}
}
Massa, Enrico. On the mathematical structure of Einstein's equations in mixed initial and boundary value problems. Comm. Math. Phys., Tome 12 (1969) no. 1, pp. 246-252. http://gdmltest.u-ga.fr/item/1103841392/