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@article{PORMA_1959__18_3_114823, author = {Samelson, Hans}, title = {A note on {Cartan's} criterion}, journal = {Portugaliae mathematica}, pages = {181--185}, publisher = {mathdoc}, volume = {18}, number = {3}, year = {1959}, mrnumber = {0126509}, zbl = {0100.26202}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1959__18_3_114823/} }
Samelson, Hans. A note on Cartan's criterion. Portugaliae mathematica, Tome 18 (1959) no. 3, pp. 181-185. http://geodesic.mathdoc.fr/item/PORMA_1959__18_3_114823/