note
  1. Degree : Bonacich P. Factoring and weighting approaches to status scores and clique identification[J]. Journal of mathematical sociology, 1972, 2(1): 113-120.
  2. Betweenness : Freeman L C. A set of measures of centrality based on betweenness[J]. Sociometry, 1977: 35-41.
  3. Closeness : Freeman L C. Centrality in social networks conceptual clarification[J]. Social networks, 1978, 1(3): 215-239.
  4. Top influential : Xinyu Huang, Dongming Chen, Dongqi Wang, et al. Identifying Influencers in Social Networks[J]. Entropy, 2020, 22, 450.