Pictures. January 2009 [2009-10-07]. (原始内容存档于2009-09-22). Johns, Ian. Spaced out with the Skins generation. The Times (London). 2007-06-07 [2009-10-14]
García-Martínez, Jesís; Soria, Elena. Intervening Sequences of Regularly Spaced Prokaryotic Repeats Derive from Foreign Genetic Elements. Journal of Molecular