@article{2312,
author = {Gi\~ao, Ant\'onio},
title = {Field equations of any differentiable variety},
journal = {Portugaliae mathematica},
volume = {17},
year = {1958},
pages = {63-83},
zbl = {0087.22602},
mrnumber = {0103757},
language = {en},
url = {http://dml.mathdoc.fr/item/2312}
}
Gião, António. Field equations of any differentiable variety. Portugaliae mathematica, Tome 17 (1958) pp. 63-83. http://gdmltest.u-ga.fr/item/2312/