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@article{CMH_1988__63_4_140137, author = {Gerald W. Schwarz}, title = {Invariant theory of {G2} and {Spin7.}}, journal = {Commentarii mathematici Helvetici}, pages = {624--663}, publisher = {mathdoc}, volume = {63}, number = {4}, year = {1988}, zbl = {0664.14006}, url = {http://geodesic.mathdoc.fr/item/CMH_1988__63_4_140137/} }
Gerald W. Schwarz. Invariant theory of G2 and Spin7.. Commentarii mathematici Helvetici, Tome 63 (1988) no. 4, pp. 624-663. http://geodesic.mathdoc.fr/item/CMH_1988__63_4_140137/