Which academic search systems are suitable for systematic reviews or meta‐analyses? Evaluating retrieval qualities of Google Scholar, PubMed, and 26 other resources

Which academic search systems are suitable for systematic reviews or meta‐analyses? 

Evaluating retrieval qualities of Google Scholar, PubMed, and 26 other resources

 2019

https://drive.google.com/file/d/1Ta60FTNA9DVTCnMJP-uO8yIpm3XZ40xr/view