1. Battams, K., Knight, M., 2013. Comet C/2012 S1 ISON. CBET 3731.
2. Combi, M.R., Quemerais, E., Maekinen, J.T.T., Ferron, S., 2013. Comet C/2012 S1 (ISON). CBET 9266.
3. Hergenrother, C., 2010. Comet C/2009 R1 (McNaught). 〈http://transientsky.wordpress.com/2010/06/27/new-comet-blues-comet-mcnaught-falls-short/〉.
4. Secular light curve of comet 28P/Neujmin 1, and of comets targets of spacecraft, 1P/Halley, 9P/Tempel 1, 19P/Borrelly, 21P/Grigg-Skejellerup, 26P/Giacobinni-Zinner, 67P/Chruyumov-Gersimenko, 81P/Wild 2;Ferrín;Icarus,2005
5. Secular light curve of comets: 133P/Elst-Pizarro;Ferrín;Icarus,2006