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J.T. Wang; P.J. Chen; D.P. Liu; J.C. Sheu; T.H. Wang; D.S. Chen. (1998). Prevalence and infectivity of hepatitis G virus and its strain variant, the GB agent, in volunteer blood donors in Taiwan. , 38(3), 290–295. doi:10.1046/j.1537-2995.1998.38398222874.x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research