@article{IM_1993__112_3_144093,
     author = {Chun-Lian Terng},
     title = {Convexity theorem for infinite dimensional isoparametric submanifolds.},
     journal = {Inventiones mathematicae},
     pages = {9--22},
     publisher = {mathdoc},
     volume = {112},
     number = {3},
     year = {1993},
     zbl = {0792.58004},
     url = {http://geodesic.mathdoc.fr/item/IM_1993__112_3_144093/}
}