1. Abundances of the elements: Meteoritic and solar
2. Arnaud, K. A. 1996, in Astronomical Data Analysis Software and Systems V, ed. G. H. Jacoby, & J. Barnes, ASP Conf. Ser., 101, 17
3. Asplund, M., Grevesse, N., & Sauval, A. J. 2005, in Cosmic Abundances as Records of Stellar Evolution and Nucleosynthesis, ed. T. G. Barnes, & F. N. Bash, ASP Conf. Ser., 336, 25
4. The prevalence of cooling cores in clusters of galaxies atz≈ 0.15-0.4