Bengochea, A., and E. Piña. “The Saturn, Janus and Epimetheus Dynamics As a Gravitational Three-Body Problem in the Plane”. Revista Mexicana De Física, vol. 55, no. 2, Jan. 2009, pp. 97-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3664.