@article{02100277,
title = {Chaotic orbits of a pendulum with variable length.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2004},
year = {2004},
zbl = {1060.34023},
language = {en},
url = {http://dml.mathdoc.fr/item/02100277}
}
Furi, Massimo; Martelli, Mario; Mike O'Neill; Staples, Carolyn. Chaotic orbits of a pendulum with variable length.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2004 (2004) . http://gdmltest.u-ga.fr/item/02100277/