1. Main-belt comet: https://en.wikipedia.org/wiki/Main-belt_comet#Members.
2. Jiangchuan Huang, PJ Ye, LZ Meng, HX Liao, Fan Guo, Tong Wang, ZX Huo. Research and Development on the Small Body Exploration in CAST.ISLPS (2018), ID: 092.
3. A Population of Comets in the Main Asteroid Belt
4. Polarimetry and photometry of the peculiar main-belt object 7968 133P/Elst-Pizarro [J;Banulo;Astronomy & Astrophysics,2010