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Eeckhaut, V.; Machiels, K.; Perrier, C.; Romero, C.; Maes, S.; Flahou, B.; Steppe, M.; Haesebrouck, F.; Sas, B.; Ducatelle, R.; Vermeire, S.; Van Immerseel, F. . (2013). Butyricicoccus pullicaecorum in inflammatory bowel disease. Gut, 62(12), 1745–1752. doi:10.1136/gutjnl-2012-303611 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research