I am using better bibtex and zotero to generate references in rmarkdown.
It works very good except that journal articles and books have an url/doi associated.
My adviser is not too happy about it and I could not figure out how to disable the url/doi in the rmarkdown config or elsewhere.
What I know is that you have to edit your *.csl file (asa.csl, apa.csl or something you use). You could accomplish this very easy by uploading it to this online csl editor. Browse to bibliography/layout/access(macro)/Group/conditional/ and look if there is an URL entry. I got rid of the DOI by setting an option there that the variable should be 'url' AND the document type 'webpage'. Then download the new *csl file, save it to your prefered directory and just knit it. (Look also here with pictures).
Note: Please make rather a safety copy before messing around with your *csl.
