Poveda, A., and P. Lara. “The Exo-Planetary System of 55 Cancri and the Titius-Bode Law”. Revista Mexicana De Astronomía Y Astrofísica, vol. 44, no. 1, June 2012, pp. 243-6, https://www.revistas.unam.mx/index.php/revmexaa/article/view/23761.