参考文献

Geu-Flores, Fernando; Sherden, Nathaniel H.; Courdavault, Vincent; Burlat, Vincent; Glenn, Weslee S.; Wu, Cen; Nims, Ezekiel; Cui, Yuehua; O'Connor, Sarah E. Nature, 2012 , vol. 491, # 7427 p. 138 - 142