Zeming Xie, Chao Liu, Mingming Luo, Zhao Liang, Shaik Gouse Peera, and Tongxiang Liang. “Theoretical Study Oxygen Reduction Activity of Phosphorus-Doped Graphene Nanoribbons”. Journal of Material Science and Technology Research 7 (March 27, 2020):  30–40. Accessed November 23, 2024. https://zealpress.com/jms/index.php/jmstr/article/view/150.