## 6 Citation Analysis
### Organization-Based Citation Analysis  
This subsection presents an analysis of citations from OT security research publishing entities. Any documents co-authored by more than 25 entities have been excluded from this analysis. The criteria for citation evaluation required at least three publications and five citations per source. The VosViewer search revealed a total of 1020 such organizations. Of these, only 139 sources satisfied the specified criteria, with 132 organizations composing the interconnected network. Table 11 highlights the top ten cited organizations possessing the highest TLS values within the non-connected network. The Table shows an organization's count of publications (Np), the number of distinct organizations citing \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Rank** & **Author** & **Country** & **Np** & **Citation** & **Links** & **TLS** \\ \hline
1 & [PERSON] & USA & 7 & 504 & 173 & 32 \\
2 & [PERSON] & Qatar & 7 & 266 & 95 & 26 \\
3 & [PERSON] [PERSON]. & Singapore & 5 & 100 & 92 & 18 \\
4 & [PERSON], [PERSON] & Qatar & 5 & 237 & 92 & 25 \\
5 & [PERSON], [PERSON] & [PERSON] R China & 5 & 190 & 117 & 27 \\
6 & [PERSON] & Singapore & 9 & 158 & 148 & 27 \\
7 & [PERSON] & Canada & 5 & 206 & 98 & 26 \\
8 & [PERSON], [PERSON] & [PERSON] R China & 4 & 183 & 121 & 24 \\
9 & [PERSON] & Canada & 4 & 201 & 49 & 26 \\
10 & [PERSON] & Peoples R China & 4 & 183 & 87 & 24 \\ \hline \hline \end{tabular}
\end{table} 
Table 10: The top 10 authors with the highest citation TLS values. them (links), citations, and the summed strengths of all such links (TLS). The statistics in Table 11 include two institutions from the PRC and two from the USA, with one institution each from Singapore, Qatar, Italy, Canada, Spain, and Australia represented. Leading the list, the Singapore University of Technology and Design boasts 28 research publications, 666 citations, 46 inter-institutional citation links, and a TLS of 114. Chinese Academy of Sciences is in second place with a relatively higher number of publications but three times smaller number of citations and comparative number of links. The number of publications by other organizations is three times or smaller compared to the leaders, although Qatar University and Washington University keep high citation numbers compared to the number of publications. Differences in TLS values are not so significant and vary from 41 to 74, except for the Singapore University of Technology and Design, which is the outstanding leader with a TLS value of 114. Figure 23 illustrates a range of global citation-based connections between institutions in the domain of OT security, using a color-coded scheme to differentiate various citation networks. The degree (number of connections) of each institution is visually represented, with the leading Chinese Academy of Sciences highlighted in green, indicating its prominent position in the network due to its substantial number of citations and connections. \begin{table}
\begin{tabular}{c c c c c c} \hline
**Rank** & **Organization** & **County** & **Np** & **Citation** & **Links** & **TLS** \\ \hline
1 & Singapore University of Technology and Design & Singapore & 28 & 666 & 46 & 114 \\
2 & Chinese Academy of Sciences & Peoples R China & 32 & 188 & 40 & 74 \\
3 & Qatar University & Qatar & 10 & 495 & 41 & 68 \\
4 & Washington University & USA & 6 & 501 & 39 & 66 \\
5 & University of Science and Technology Beijing & Peoples R China & 10 & 185 & 32 & 61 \\
6 & University of Padua & Italy & 6 & 131 & 31 & 55 \\
7 & University of Guelph & Canada & 8 & 240 & 27 & 44 \\
8 & University of Oviedo & Spain & 5 & 37 & 29 & 43 \\
9 & The Queensland University of Technology & Australia & 7 & 182 & 23 & 42 \\
10 & Virginia Commonwealth University & USA & 8 & 84 & 17 & 41 \\ \hline \end{tabular}
\end{table} 
Table 11: The top 10 organizations with the highest citation TLS values. Figure 22: A visual representation of the citation network among authors within the domain of OT security.