Table 1.

Main information about the selected sample

DescriptionResults
Main information about data 
Timespan1984–2022 (up to May)
Sources (Journals)247
Documents640
Average years from publication6.56
Document types 
Article621
Review19
Document contents 
Keywords plus (ID)1,119
Author's keywords (DE)1,729
Authors 
Authors1,247
Author appearances1,556
Authors of single-authored documents148
Authors of multi-authored documents1,133
Authors collaboration 
Single-authored documents168
Documents per author0.507
Authors per document1.97
Co-authors per documents2.43
Collaboration index2.36

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