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Menzel, H-J; Sarmanova, J; Soucek, P; Berberich, R; Grünewald, K; Haun, M; Kraft, H-G . (2004). Association of NQO1 polymorphism with spontaneous breast cancer in two independent populations. British Journal of Cancer, 90(10), 1989–1994. doi:10.1038/sj.bjc.6601779 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research