bibcheck – Check on ref­er­ences to items in the­bib­li­og­ra­phy

A the­bib­li­og­ra­phy en­vi­ron­ment that's been built by hand may well con­tain ci­ta­tions of things for which there is no ref­er­ence in the doc­u­ment. This pack­age pro­duces a warn­ing for each such thing. (Note that the pack­age is of no use for users of BibTeX, since BibTeX doesn't cre­ate ci­ta­tions un­less there is a ref­er­ence.)