Aladin Sky Atlas. Centre de Données Astronomiques de Strasbourg.
Huxor et. al. 2006, “A new population of extended, luminous star clusters in the halo of M31
SIMBAD Astronomical Database. Centre de Données Astronomiques de Strasbourg.
VizieR. Centre de Données Astronomiques de Strasbourg.
Sparke, Linda S. and John S. Gallagher. Galaxies in the Universe. Cambridge, New York: Cambridge University Press, 2000.
Elmegreen, Debra Meloy. Galaxies & Galactic Structure. Upper Saddle River, New Jersey: Prentice Hall Inc., 1998.
Hubble Space Telescope Catalogues , MAST HST Multimission Archive at STScI.
Globular Clusters in M31 and M33 (Mochejska+, 1998)
VI photometry of M33 star clusters (Chandar+, 2001)
New star clusters in M33 (Bedin+, 2005)
Star Clusters in M33 (Chandar+, 1999)