@article{10_2307_121022,
     author = {Ernst Heintze and Xiaobo Liu},
     title = {Homogeneity of infinite dimensional isoparametric submanifolds},
     journal = {Annals of mathematics},
     year = {1999},
     volume = {149},
     number = {1},
     doi = {10.2307/121022},
     zbl = {0931.53027},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/121022/}
}