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Wu, Qi, Wang Liu, Chen Li, Xiongfeng Li, ja Ping Zhou. "A Price Paid for Our Internal Strife: Escalated Intragroup Aggression and the Evolution of Ingroup Derogation." Front Psychol 2016.

Wu, Qi, et al. "A Price Paid for Our Internal Strife: Escalated Intragroup Aggression and the Evolution of Ingroup Derogation." Front Psychol 2016.