@article{article4ab3eed4,
title   = {Homogeneous structures and rigidity of isoparametric submanifolds in Hilbert space},
author = {Gorodski, Claudio and Heintze, Ernst},
year = {2012},
doi = {10.1007/s11784-012-0079-y},
journal   = {Journal of Fixed Point Theory and its Applications}
}