Supeno M, Siburian R. Conversion of Coconut Shell tobe Graphite and Graphene Nano Sheets Switching, Is It Possible?. smr [Internet]. 2018 Mar. 5 [cited 2024 Apr. 26];3(1):1-5. Available from: https://onlinesciencepublishing.com/index.php/smr/article/view/453