Norswg, Knut J., Priscilla K. S. Fawcen, and Andrew P. Vovides. “Beetle Pollination of Two Species of Zamia: Evolutionary and Ecological Considerations”. Journal of Palaeosciences 41 (December 31, 1992): 149–158. Accessed November 22, 2024. https://jpsonline.co.in/index.php/jop/article/view/1116.