@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/