„Anti-Gastric Ulcer Effect of Betulinic Acid in Male Albino Rats” (2021) Nigerian Journal of Physiological Sciences, 30(1), o. 033–037. Elérhető: https://www.ojshostng.com/index.php/njphysiologicalsciences/article/view/1831 (Elérés: 8 július 2026).