Guangmin  Li, Chen, Mingzhi , Ouyang, Yu , Yao, Di , Li, Lei , Wang, Liang , Xia, Xifeng , Lei, Wu , Chen, Shen-Ming , Mandler, Daniel , and Hao, Qingli . 2019. ?Manganese Doped Co3O4 Mesoporous Nanoneedle Array For Long Cycle-Stable Supercapacitors?. Applied Surface Science, 469, Pp. 941-950. doi:10.1016/j.apsusc.2018.11.099.