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V. A. Hiday; M. S. Swartz; J. W. Swanson; R. Borum; H. R. Wagner. (1998). Male–female differences in the setting and construction of violence among people with severe mental illness. , 33(1 Supplement), S68–S74. doi:10.1007/s001270050212 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research