1. Brown, J.C., Hayward, J. and Spicer, D.S.: 1981, Astrophys. J. (Letters)
245, L91.
2. Dennis, B.R. and Zarro, D.M.: 1992, in press.
3. Dröge, W., Meyer, P., Evanson, P. and Moses, D.:1989, Solar Phys. 121,95.
4. Hamilton, R.J. and Petrosian, V.: 1992, Astrophys. J., in press.
5. Harding, A.K., Petrosian, V. and Teegarden, B.J.: 1986, in E. Liang and V. Petrosian (eds.), Gamma-ray Bursts, AIP Conference Proceedings 141 (Stanford, CA), p. 115.