A. Saputra, P. Satwikanitya, F. Puspita, M. W. Sya’bani, M. F. Agustian, and W. Pambudi, “Synthesis of epoxy oil from Waste Cooking Oil (WCO) using acetic acid and amberlite resin IR-120 as catalyst”, Eng Appl Sci Res, vol. 50, no. 4, pp. 335–342, Jul. 2023.