@article{01024336,
title = {Combinatorics of curvature, and the Bianchi identity.},
journal = {Theory and Applications of Categories [electronic only]},
volume = {3},
year = {1997},
pages = {69-89},
zbl = {0877.58002},
language = {en},
url = {http://dml.mathdoc.fr/item/01024336}
}
Kock, Anders. Combinatorics of curvature, and the Bianchi identity.. Theory and Applications of Categories [electronic only], Tome 3 (1997) pp. 69-89. http://gdmltest.u-ga.fr/item/01024336/