Teixeira, Generosa, and Ana Monteiro. “Leaf Phytognostic Characters of Six Species of Hypericum L. (Hypericaceae)”. RA Journal Of Applied Research 3, no. 12 (December 23, 2017): 1302–1313. Accessed November 22, 2024. http://rajournals.in/index.php/rajar/article/view/116.