Feng, M., W. Lu, R. Zhen, Y. Wang, and Y. Zhou. “Effects of Polypyrrole/Graphene Oxide Composites With Different Reaction Times on Electrochemical Performance”. Non-Metallic Material Science, vol. 2, no. 1, Apr. 2020, pp. 6-8, doi:10.30564/omms.v2i1.1699.