1Rees M J, Meszaros P. Unsteady outflow models for cosmological gamma-ray bursts. Astrophys J Lett, 1994, 430:93--96
2Link B, Epstein R I, Priedhorsky W C. Prevalent properties of gamma-ray burst variability. Astrophys J Lett, 1993, 408: 81-- 84
3Fenimore E E, in't Zand J J M, Norris J P, et al. Gamma-ray burst peak duration as a function of energy. Astrophys J Lett, 1995, 448:101--104
4Norris J P, Marani G F, Bonnell J T. Connection between energy-dependent lags and peak luminosity in Gamma-ray bursts. Astrophys J, 2000, 534:248--257
5Chen L, Lou Y Q, Wu M, et al. Distribution of spectral lags in Gamma-ray bursts. Astrophys J, 2005, 619:983--993
6Kobayashi S, Piran T, Sari R. Can internal shocks produce the variability in Gamma-ray bursts? Astrophys J, 1997, 490: 92-- 98
7Wu B, Fenimore E E. Spectral lags of Gamma-ray bursts from Ginga and BATSE. Astrophys J Lett, 2000, 535:29--32
8Fenimore E E, Ramirez-Ruiz E, Wu B. GRB 990123: Evidence that the Gamma rays come from a central engine. Astrophys J Lett, 1999, 518:L73--L76
9Wijers A M J, Rees M J, Meszaros P. Shocked by GRB 970228: The afterglow of a cosmological fireball. MNRAS Lett, 1997, 288:51--54
10Reichart D. Observations and theoretical implications of GRB 970228. Astrophys J Lett, 1997, 485:L57--61