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Kardos, Marisa; Levine, Danielle; Gürcan, Hakan M.; Ahmed, A Razzaque . (2009). Pemphigus Vulgaris in Pregnancy. Obstetrical & Gynecological Survey, 64(11), 739–749. doi:10.1097/ogx.0b013e3181bea089 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research