1. Haber, M. (2006) Astronomers Declare February No Longer a Month, Submitted to a joke website gcfl.net/archive.php?funny=4775 and widely circulated on the www
2. Debating Pluto: Searching for the Classroom of the Future and Ending up in the Past;Crider;Astronomy Beat,2011
3. Brown, M. et al. 2006b, web.gps.caltech.edu/mbrown/eightplanets
4. Fischer, D. 2006, Inside the planet definition process, The Space Review, Monday, September 11, 2006