Omoniyi, F. O., et al. “Synthesis and Characterization of Graphene-Cu Composite Via Hydrothermal Method”. Journal of Sustainable Materials Processing and Management , vol. 2, no. 2, Oct. 2022, pp. 30-40, https://penerbit.uthm.edu.my/ojs/index.php/jsmpm/article/view/11565.