Zhu, Lei, Ze-Da Meng, Ming-Liang Chen, Jong-Geun Choi, Chong-Yeon Park, Shi-Choon Lee, Dae-Seung Hong, and Won-Chun Oh. 2011. “Colloidal Suspension Properties of Carbonaceous Nanomaterials Enhanced by Using Li As Dopant”. Asian Journal of Chemistry 24 (2):773-76. https://asianpubs.org/index.php/ajchem/article/view/8653.