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Kao, Yuan S.; Whang-Peng, Jacqueline; Lee, Elaine . (1983). A Simple, Rapid, High-resolution Chromosome Technic for Lymphocytes. American Journal of Clinical Pathology, 79(4), 481–483. doi:10.1093/ajcp/79.4.481 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research