@article{GDZPPN000367338,
title = {A Helmholtz-Lie Type Characterization of Ellipsoids, I .},
journal = {Discrete \& computational geometry},
volume = {13},
year = {1995},
pages = {517-528},
zbl = {0824.52006},
url = {http://dml.mathdoc.fr/item/GDZPPN000367338}
}
Gruber, P.M. A Helmholtz-Lie Type Characterization of Ellipsoids, I .. Discrete & computational geometry, Tome 13 (1995) pp. 517-528. http://gdmltest.u-ga.fr/item/GDZPPN000367338/