I'm looking for software that allows me to extract citations from a pdf article and the number of occurrences of each citation. I'm looking to use this as a (admittedly very imperfect) proxy to estimate what citations a paper is based on.

In case it matters, the citation style the papers are using is mostly APA.

I'm using scite.ai now but it's not getting the job done in a satisfactory way because it miscounts the number of times a reference has been cited. I would also prefer a free option if that exists.

If there is a better heuristic to estimate which citations a paper is primarily based on (which can be automated), I'm also interested. But perhaps that's a topic for a new question.



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