Uzun, Ferat. “Ontogenic Changes in Hypericin Content of Some <i>Hypericum</i> Species in Natural Pastureland of Turkey”. Bangladesh Journal of Botany 38, no. 1 (May 26, 2010): 13–18. Accessed May 1, 2024. https://www.banglajol.info/index.php/BJB/article/view/5113.