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MARK J. SCHMIT; JENIFER A. KIHM; CHET ROBIE. (2000). DEVELOPMENT OF A GLOBAL MEASURE OF PERSONALITY. , 53(1), 153–193. doi:10.1111/j.1744-6570.2000.tb00198.x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research