I am trying to find a way to search for all the citations contained in an article. What I want to do is create a workflow for my research where:

1. I have a pool of articles that I have already read.
2. I want to find a new article to read, based on this pool of articles, so I find all the citations of all the read articles and calculate the most cited article, which is the next article I should read (obviously skipping articles that I have already read).

But I have been unable to find a way to automatically download all of the citations of a specific article. Is there no way to do it? even payed?