Nitsri Sangduen, Methanee Toahsakul, and Vipa Hongtrakul. “Comparative Karyomorphological Study between Male and Female Plants of Some Cycas and Zamia Species”. Agriculture and Natural Resources 43, no. 3 (September 30, 2009): 476–485. accessed April 14, 2025. https://li01.tci-thaijo.org/index.php/anres/article/view/244693.