Kim, M., Wilkes, B. J., Kim, D.-W., Green, P. J., Barkhouse, W. A., Lee, M. G., et al. (2007). Chandra multiwavelength project X-ray point source number counts and the cosmic X-ray background. Astrophysical Journal, 659(1 Part 1), 29-51. doi:10.1086/511630.