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Fordyce, James A.; Nice, Chris C. (2003). "Contemporary Patterns in a Historical Context: Phylogeographic History of the Pipevine Swallowtail, Battus Philenor (Papilionidae)". Evolution. 57 (5): 1089–99. doi:10.1554/0014-3820(2003)057[1089:cpiahc]2.0.co;2. PMID12836825.