1. Fenimore, E. E. & Ramirez-Ruiz, E. 2001, ApJ, submitted (astro-ph/0004176)
2. Fishman, G. J., etal 1989, in GRO Science Workshop Proc., ed. W. N. Johnson (Greenbelt: NASA), 2-39
3. Frail, D. A., etal 2001, Nature, submitted (astro-ph/0102282)
4. Gandolfi, G., etal 2000, in AIP Conf. Proc. 526, Gamma-Ray Bursts, ed. R. M. Kippen, R. S. Mallozzi, & G. J. Fishman (New York: AIP), 23
5. Hakkila, J., Meegan, C. A., Pendleton, G. N., Malozzi, R. S., Haglin, D. J. & Roiger, R. J. 2000, in AIP Conf. Proc. 526, Gamma-Ray Bursts, ed. R. M. Kippen, R. S. Mallozzi, & G. J. Fishman (New York: AIP), 48