@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/