Twelve hundred non-triggered gamma ray burstsB. Stern, Ya. Tikhomirova, M. Stepanov, D. Kompaneets, A. Berezhnoy and R. SvenssonAstron. Astrophys. Suppl. Ser., 138 3 (1999) 413-414DOI: https://doi.org/10.1051/aas:1999289