D. Satria, Rifda Amaliya Ma’ruf, Syukur Berkat Waruwu, Urip Harahap, and Hari Purnomo4, “Antioxidant activity of 1.3-bis(p-hydroxyphenyl)urea by CUPRAC and FRAP methods”, Indonesian J. of Pharmaceutical and Clinical Res., vol. 6, no. 1, pp. 48–54, Apr. 2023.