Review Article
A Tool-Based Perspective on Software Code Maintainability Metrics: A Systematic Literature Review
Table 3
Number of manuscripts collected from the selected digital libraries.
| | Library | Before refinement | After refinement | Without duplicates |
| | ACM Digital Library | 497 | 152 | — | | IEEE Xplore | 443 | 215 | — | | Scopus | 848 | 381 | — | | Web of Science | 599 | 300 | — | | Total | 2387 | 1048 | 801 |
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