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Peters, Suzanne M.; Tuffnell, Joe A.; Pinter, Ilona J.; van der Harst, Johanneke E.; Spruijt, Berry M. . (2017). Short- and long-term behavioral analysis of social interaction, ultrasonic vocalizations and social motivation in a chronic phencyclidine model. Behavioural Brain Research, 325(), 34–43. doi:10.1016/j.bbr.2017.02.027 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research