Tissos, Nurry Putri, et al. “Synthesis of Cuprum (Cu) Layer by Electrodeposition Method With Theobroma Cacao Peels As Corrosion Protector of Steel”. International Journal on Advanced Science, Engineering and Information Technology, vol. 8, no. 4, July 2018, pp. 1290-5, doi:10.18517/ijaseit.8.4.4104.