I'm editing a thesis where I need to correct the format of in-text citations, like "Hassan et al., 1994". I need to delete those commas. In this document, the citations are field results rather than ordinary text. Find and Replace doesn't search within those field results, and exposing the field codes doesn't work because the codes contain instructions to generate the citations, not the citation text itself. So showing the field codes doesn't help.

I could simply convert the fields to regular text, but this field system may be valuable to the author, and I don't want to destroy her work.

Is there any way to use Find and Replace in this situation?