@article{GDZPPN002063069,
title = {A characterisation of the ellipsoid in terms of concurrent sections.},
journal = {Commentarii mathematici Helvetici},
volume = {53},
year = {1978},
pages = {485-507},
zbl = {0392.52007},
url = {http://dml.mathdoc.fr/item/GDZPPN002063069}
}
Burton, G.R.; Mani, P. A characterisation of the ellipsoid in terms of concurrent sections.. Commentarii mathematici Helvetici, Tome 53 (1978) pp. 485-507. http://gdmltest.u-ga.fr/item/GDZPPN002063069/