Peter M. Gruber. A Helmholtz-Lie Type Characterization of Ellipsoids, I. Discrete & Computational Geometry, 13:517-527, 1995.
@article{Gruber95:0, title = {A Helmholtz-Lie Type Characterization of Ellipsoids, I}, author = {Peter M. Gruber}, year = {1995}, researchr = {https://researchr.org/publication/Gruber95%3A0}, cites = {0}, citedby = {0}, journal = {Discrete & Computational Geometry}, volume = {13}, pages = {517-527}, }