orderrefs – Sort bibliography in LaTeX document by order of citation

When the bib­li­og­ra­phy in a LaTeX doc­u­ment is made ‘by hand’ (i.e., with­out use of BibTeX), it is fre­quently nec­es­sary to re­order the items in the bib­li­og­ra­phy ac­cord­ing to their or­der of ci­ta­tion. Order­refs is a lit­tle pro­gram that au­to­mates this re­order­ing. It is a portable Perl script that should run on any com­puter with a work­ing Perl in­stal­la­tion.