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@article{MM2_1996__91_3_156240, author = {D. Ferus and E. Pedit}, title = {Curved flats in symmetric spaces.}, journal = {Manuscripta mathematica}, pages = {445--454}, publisher = {mathdoc}, volume = {91}, number = {3}, year = {1996}, zbl = {0870.53043}, url = {http://geodesic.mathdoc.fr/item/MM2_1996__91_3_156240/} }
D. Ferus; E. Pedit. Curved flats in symmetric spaces.. Manuscripta mathematica, Tome 91 (1996) no. 3, pp. 445-454. http://geodesic.mathdoc.fr/item/MM2_1996__91_3_156240/