Azeez, Hoshyar A. “Comparison Between Hypericum Triquetrifolium Leaves and Derived Calli in Essential Oil Content”. Al-Nahrain Journal of Science 20, no. 2 (June 1, 2017): 123–130. Accessed October 24, 2026. https://www.anjs.edu.iq/index.php/anjs/article/view/90.