@article{GDZPPN00210315X, title = {Convexity theorem for isoparametric submanifolds.}, journal = {Inventiones mathematicae}, volume = {83}, year = {1986}, pages = {487-492}, zbl = {0615.53048}, url = {http://dml.mathdoc.fr/item/GDZPPN00210315X} }
Terng, Ch. L. Convexity theorem for isoparametric submanifolds.. Inventiones mathematicae, Tome 83 (1986) pp. 487-492. http://gdmltest.u-ga.fr/item/GDZPPN00210315X/