@article{1103840049,
author = {Lovelock, D.},
title = {Weakened field equations in general relativity admitting an ``unphysical'' metric},
journal = {Comm. Math. Phys.},
volume = {4},
number = {1},
year = {1967},
pages = { 205-214},
language = {en},
url = {http://dml.mathdoc.fr/item/1103840049}
}
Lovelock, D. Weakened field equations in general relativity admitting an ``unphysical'' metric. Comm. Math. Phys., Tome 4 (1967) no. 1, pp. 205-214. http://gdmltest.u-ga.fr/item/1103840049/