Böhringer, H., Collins, C. A., Guzzo, L., Schuecker, P., Voges, W., Neumann, D. M., Schindler, S., Chincarini, G., De Grandi, S., Cruddace, R. G., Edge, A. C., Reiprich, T. H., & Shaver, P. (2002). The ROSAT-ESO Flux-Limited X-ray (REFLEX) Galaxy Cluster Survey. IV. The X-ray luminosity function. The Astrophysical Journal, 566(1), 93-102.