„Anti-Gastric Ulcer Effect of Betulinic Acid in Male Albino Rats“, NJPS, let. 30, št. 1, str. 033–037, maj 2021, Pridobljeno: 5. junij 2026. [Na spletu]. Dostopno na: https://ojshostng.com/index.php/njphysiologicalsciences/article/view/1831