Sitorus M, Suyanti RD, Jahro IS, Siahaan SB, Saragih I, Sitorus FTA. Effectiveness of sulfuric acid and hydrochloric acid catalysts in the esterification of frankincense cinnamic acid with ethanol and methanol. J.Pendidik.Kim [Internet]. 2024 Apr. 30 [cited 2025 Jul. 5];16(1):50-6. Available from: https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/53231