1. Rapid X-ray flaring from the direction of the supermassive black hole at the Galactic Centre
2. Baganoff, F. K., Maeda, Y., Morris, M., et al. 2001b, ApJ, submitted [astro-ph/0102151]
3. Blum, R. D., Ramírez, S. V., & Sellgren, K. 1999, in The Central Parsecs of the Galaxy, ed. H. Falcke, A. Cotera, W. Duschl, F. Melia, & M. Rieke (San Francisco: ASP), ASP Conf. Ser., 186, 291
4. The First Stellar Abundance Measurements in the Galactic Center: The M Supergiant IRS 7