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"GRIN Species Records of Celtis". Germplasm Resources Information Network. United States Department of Agriculture. Archived from the original on 2009-01-20. Retrieved 2010-12-04.
Brower, Andrew V.Z. (2006). Problems with DNA barcodes for species delimitation: ‘ten species’ of Astraptes fulgerator reassessed (Lepidoptera: Hesperiidae). Systematics and Biodiversity4(2): 127–132. doi:10.1017/S147720000500191XPDF fulltext