Christopher F. Chyba, Paul J. Thomas & Kevin J. Zahnle. The 1908 Tunguska explosion: atmospheric disruption of a stony asteroid. Nature. 1993-01-07, 361 (6407): 40–44. Bibcode:1993Natur.361...40C. doi:10.1038/361040a0.使用|accessdate=需要含有|url= (帮助)
Christopher F. Chyba, Paul J. Thomas & Kevin J. Zahnle. The 1908 Tunguska explosion: atmospheric disruption of a stony asteroid. Nature. 1993-01-07, 361 (6407): 40–44. Bibcode:1993Natur.361...40C. doi:10.1038/361040a0.使用|accessdate=需要含有|url= (帮助)