Stereoscopic observations of the giant hard X-ray/gamma-ray solar flare on 1991 June 30 at 0255 UTG. Trottet, R. A. Schwartz, K. Hurley, J. M. McTiernan, S. R. Kane and N. VilmerA&A, 403 3 (2003) 1157-1163DOI: https://doi.org/10.1051/0004-6361:20030409
