Pinkau, K. Office of the Director (DI), Max Planck Institute for Plasma Physics, Max Planck Society;
http://adsabs.harvard.edu/full/1992A%26A...255L..13S (Any fulltext)
Schneid, E. J., Bertsch, D. L., Fichtel, C. E., Hartman, R. C., Hunter, S. D., Kanbach, G., et al. (1992). EGRET detection of high energy gamma rays from the gamma-ray burst of 3 May 1991. Astronomy and Astrophysics, 255: L13-L16.