@article{GDZPPN002067005,
title = {Invariant theory of G2 and Spin7.},
journal = {Commentarii mathematici Helvetici},
volume = {63},
year = {1988},
pages = {624-663},
zbl = {0664.14006},
url = {http://dml.mathdoc.fr/item/GDZPPN002067005}
}
Schwarz, Gerald W. Invariant theory of G2 and Spin7.. Commentarii mathematici Helvetici, Tome 63 (1988) pp. 624-663. http://gdmltest.u-ga.fr/item/GDZPPN002067005/