and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful
1086/498708. Kochanek၊ C. S.; et al. (October 2001)၊ "The K-Band Galaxy Luminosity Function"၊ The Astrophysical Journal၊ 560 (2): 566–579၊ arXiv:astro-ph/0011456၊