Shuo Xu, Zhen Liu, Xin An, Hong Wang, and Hongshen Pang, 2024. Linkages among Science, Technology, and Industry on the basis of Main Path Analysis. Journal of Informetrics.
Shuo Xu, Xiaodong Qiao, Lijun Zhu, Yunliang Zhang, Chunxiang Xue, and Lin Li, 2016. Reviews on Determining the Number of Clusters. Applied Mathematics & Information Sciences, Vol. 10, No. 4, pp. 1493-1520.