N. Rahman, S. A. Marliyati, M. R. M. Damanik, and F. Anwar, “Antioxidant Activity and Total Phenol Content of Ethanol Extract Takokak Fruit (Solanum torvum)”, Pak. J. Nutr., vol. 12, no. 11, pp. 973–977, Oct. 2013, doi: 10.3923/pjn.2013.973.977.