Mallick, Pushpa Karna. “Karyomorphology, Meiotic Behaviours and Pollen Fertility of Calendula Officinalis L. (Calenduleae- Asteraceae)”. International Journal of Applied Sciences and Biotechnology 9, no. 1 (March 30, 2021): 75–79. Accessed November 21, 2024. https://nepjol.info./index.php/IJASBT/article/view/36011.