10 Don’t waste your time with `bibtex` and use `biblatex` instead. Out of the box, it has macros like `\citeauthor` and it is also much more flexible for crazy customisations nobody might have thought of yet. For example citing the abstract as `tcolorbox` can be done with only a couple of lines of code.
11 *Disclaimer:* This answer just lists why this doesn't work. The below "What could you do" is only a proof of concept, which might break things and I don't advise anybody to actually use that code!