@article{GDZPPN002199599,
title = {Geodesics on quadrics and a mechanical problem of C. Neumann.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {334},
year = {1982},
pages = {69-78},
zbl = {0478.58014},
url = {http://dml.mathdoc.fr/item/GDZPPN002199599}
}
Knörrer, Horst. Geodesics on quadrics and a mechanical problem of C. Neumann.. Journal für die reine und angewandte Mathematik, Tome 334 (1982) pp. 69-78. http://gdmltest.u-ga.fr/item/GDZPPN002199599/