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Gupta, T; Beaconsfield, M; Rose, G E; Verity, D H . (2012). Discoid lupus erythematosus of the periorbita: clinical dilemmas, diagnostic delays. Eye, 26(4), 609–612. doi:10.1038/eye.2011.340 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research