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Norman, Eliane M.; Clayton, David (1986). "Reproductive Biology of two Florida Pawpaws: Asimina obovata and A. pygmaea (Annonaceae)". Bulletin of the Torrey Botanical Club. 113 (1): 16. doi:10.2307/2996229. ISSN0040-9618. JSTOR2996229.
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Norman, Eliane M.; Clayton, David (1986). "Reproductive Biology of two Florida Pawpaws: Asimina obovata and A. pygmaea (Annonaceae)". Bulletin of the Torrey Botanical Club. 113 (1): 16. doi:10.2307/2996229. ISSN0040-9618. JSTOR2996229.