Norhayati Muhammad, Nur Fazira Abdul Rahim, Norazlin Abdullah, Balkis A Talip, and Nur Jihan Shahirah Dusuki, “Optimization of the Antioxidant Properties of the Polyherbal Formulations”, J. Adv. Res. Fluid Mech. Therm. Sc., vol. 50, no. 1, pp. 16–25, Oct. 2018.