Google Scholar captures the most current research articles, sometimes even in their prepublication format. Importantly for you as you do your literature review, you can search your found articles by their titles to see how often they've been cited since their publication. This gives you the ability to determine:
How influential is this research? The higher the number of citations, the more relevant other scholars have found it to build on their research.
Who has used it, and how? By finding links to the articles themselves, you strengthen your lit review by finding the most current research available.