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. Aschenbach, B. 2007, in Supernova 1987A: 20 Years After: Supernovae and Gamma-Ray Bursters, ed. S. Immler, K. Weiler, & R. McCray, AIP Conf. Ser., 937, 33
4. Supernova Remnants in the Sedov Expansion Phase: Thermal X‐Ray Emission