@article{GDZPPN002097257,
title = {Closed Curves on Convex Hypersurfaces and Periods of Nonlinear Oscillations.},
journal = {Inventiones mathematicae},
volume = {64},
year = {1981},
pages = {199-202},
zbl = {0471.70020},
url = {http://dml.mathdoc.fr/item/GDZPPN002097257}
}
Weinstein, Alan; Croke, Christpher B. Closed Curves on Convex Hypersurfaces and Periods of Nonlinear Oscillations.. Inventiones mathematicae, Tome 64 (1981) pp. 199-202. http://gdmltest.u-ga.fr/item/GDZPPN002097257/