Qin, Qin, and Yong-qiang He. “Random Walk Based Key Nodes Discovery in Opportunistic Networks”. International Journal of Online and Biomedical Engineering (iJOE) 12, no. 03 (March 31, 2016): pp. 28–35. Accessed April 27, 2024. https://online-journals.org/index.php/i-joe/article/view/5412.