@article{1183423967,
author = {Emch, Arnold},
title = {A theorem on the curves described by a spherical pendulum},
journal = {Bull. Amer. Math. Soc.},
volume = {24},
number = {3},
year = {1917},
pages = { 230-232},
language = {en},
url = {http://dml.mathdoc.fr/item/1183423967}
}
Emch, Arnold. A theorem on the curves described by a spherical pendulum. Bull. Amer. Math. Soc., Tome 24 (1917) no. 3, pp. 230-232. http://gdmltest.u-ga.fr/item/1183423967/