@article{IM_1986__85_143378,
     author = {Ch. L. Terng},
     title = {Convexity theorem for isoparametric submanifolds.},
     journal = {Inventiones mathematicae},
     pages = {487--492},
     publisher = {mathdoc},
     volume = {85},
     year = {1986},
     zbl = {0615.53048},
     url = {http://geodesic.mathdoc.fr/item/IM_1986__85_143378/}
}