When you do a literature review, one way to see if there have been new developments is to do a forward search for an author of an article or book. When you forward search, you are looking for others who have cited the work of the author.
Here are two ways to search for sources that have cited a source you are using.
Search for the article in Google Scholar and then click on the "Cited by" link to see sources that have cited the author of your article.
Here's an example of a search for an atricle about music and memory by Lutz Jäncke: