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Fan, M.W.; Bian, Z.; Peng, Z.X.; Zhong, Y.; Chen, Z.; Peng, B.; Jia, R. . (2002). A DNA Vaccine Encoding a Cell-surface Protein Antigen of <i>Streptococcus mutans</i> Protects Gnotobiotic Rats from Caries. Journal of Dental Research, 81(11), 784–787. doi:10.1177/0810784 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research