I need two bib-like sections: a "References" giving works explicitly cited in my text, and a "Bibliography" (or "Further reading" if you prefer) giving everything from my bibfile that didn't already appear in "References". The first is of course completely standard, but the second... I'm stumped.
Further loose constraints: I'm somewhat committed to
biblatex and the
biblatex-apa style. But I'll happily accept an answer not related to them if there's any chance I can adapt it.