@article{GDZPPN002136724,
title = {Variational Principles in the General Theory of Relativity.},
journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
volume = {74},
year = {1972},
pages = {1-65},
zbl = {0246.49038},
url = {http://dml.mathdoc.fr/item/GDZPPN002136724}
}
Rund, H.; Lovelock, D. Variational Principles in the General Theory of Relativity.. Jahresbericht der Deutschen Mathematiker-Vereinigung, Tome 74 (1972) pp. 1-65. http://gdmltest.u-ga.fr/item/GDZPPN002136724/