Temporal properties of gamma ray bursts as signatures of jets from the central engine F. Quilligan, B. McBreen, L. Hanlon, S. McBreen, K. J. Hurley and D. Watson A&A, 385 2 (2002) 377-398 Published online: 15 April 2002 DOI: 10.1051/0004-6361:20020038