Thanks for this. Just a quick follow-up: if I use the same reference in different papers, do I need to make those changes we were discussing on each per-paper json file, or is there a way to do them once and for all?
By default it will be stored in the directory from which pandoc is invoked, but you can also change that by setting `url2cite-cache: filename` in the markdown frontmatter or in the pandoc invocation: `pandoc -M url2cite-cache=../bla.json --filter ...`.