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Gaitanis, G.; Kalogeropoulos, C.; Bassukas, I. D. . (2011). Imiquimod can be combined with cryosurgery (immunocryosurgery) for locally advanced periocular basal cell carcinomas. British Journal of Ophthalmology, 95(6), 890–892. doi:10.1136/bjo.2010.195800 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research