A set of scripts for extracting entries from .bib file, in particular those cited in a particular document.

Bibextract itself extracts from a list of BibTeX .bib files those bibliography entries that match a pair of specified regular expressions, sending them to stdout, together with all BibTeX "@Preamble{...}" and "@String{...}" commands.

Citefind from a list of BibTeX .bib files those bibliography entries that match a specified list of citation tags, possibly produced by citetags.

Citetags extracts BibTeX citation tags from a LaTeX source file or .aux file and sends them to stdout, possibly for later input to citefind.

The author is Nelson H. F. Beebe. See also bibexport.