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^ Goodfellow, Michael; Williams, Stanley T.; Alderson, Grace (July 1986). "Transfer of Actinosporangium violaceum Krasil'nikov and Yuan, Actinosporangium vitaminophilum Shomura et al. and Actinopycnidium caeruleum Krasil'nikov to the Genus Streptomyces, with Amended Descriptions of the Species". Systematic and Applied Microbiology. 8 (1–2): 61–64. doi:10.1016/s0723-2020(86)80149-7.