A selection of sample literature reviews are listed below.
They are broad in scope and not necessarily scientific in nature, however they may prove helpful as a reference point, or for you to obtain a few ideas regarding the structure of a review.
The evolution of mathematics support: a literature review
https://search.ebscohost.com/
Parkinson's disease and occupational exposures: a systematic literature review and meta-analyses
https://www.jstor.org/stable/
Employment Among Current and Former Welfare Recipients: A Literature Review
https://laverne.libguides.com/
Considering the Environment in Transportation Planning: Review of Emerging Paradigms and Practice in the United States
https://laverne.libguides.com/