I have a big library filled with all the (potential) sources that I thought I might need for my thesis. It turned out I didn't need them all so now there's literature in my library that I have not used in my document.
Since tot all of the sources are structured the way they need to be in order to bo quoted correctly I am wondering: Is there a way to find out which ones I have actually used within my document? That way, I could spare the work of formatting sources that weren't used at all. Help much mich appreciated!