@article{MAN_1989__284_4_164568,
     author = {Kwang Sung Park},
     title = {Isoparametric families on projective spaces.},
     journal = {Mathematische Annalen},
     pages = {503--514},
     year = {1989},
     volume = {284},
     number = {4},
     zbl = {0653.53042},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__284_4_164568/}
}