Which database repository (e.g. ACM, IEEE, Web of Science, Elsvier, Science Direct , Scopus etc) should be used for systematic literature review?
How can we eliminate the threat to read the same paper exist in different database? I have an observation that there are many papers exist in IEEE and ACM and similarly web of science index many IEEE and ACM papers.
So what database or indexing should we prefer while doing the systematic literature review?