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Tsuji, Kaname; Yasuda, Norihiro; Ueda, Mamoru; Nakanishi, Tamaki; Yoshida, Hiroaki; Oshita, Naohiro; Gamoh, Shoko; Wato, Masahiro; Morita, Shosuke . (2017). Painless exophytic mass of the anterior maxillary gingiva—Report of extremely rare case of peripheral dentinogenic ghost cell tumor and review the literature. Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology, (), S2212555817300078–. doi:10.1016/j.ajoms.2017.01.007 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research