@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/}
}