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@article{CMH_1978__53_139750, author = {G.R. Burton and P. Mani}, title = {A characterisation of the ellipsoid in terms of concurrent sections.}, journal = {Commentarii mathematici Helvetici}, pages = {485--507}, publisher = {mathdoc}, volume = {53}, year = {1978}, zbl = {0392.52007}, url = {http://geodesic.mathdoc.fr/item/CMH_1978__53_139750/} }
G.R. Burton; P. Mani. A characterisation of the ellipsoid in terms of concurrent sections.. Commentarii mathematici Helvetici, Tome 53 (1978), pp. 485-507. http://geodesic.mathdoc.fr/item/CMH_1978__53_139750/