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Powers, Ann M., Aaron C. Brault, Yukio Shirako, Ellen G. Strauss, WenLi Kang, James H. Strauss, و Scott C. Weaver. Evolutionary Relationships and Systematics of the Alphaviruses. American Society for Microbiology, 2001.

Powers, Ann M., et al. Evolutionary Relationships and Systematics of the Alphaviruses. American Society for Microbiology, 2001.