alphabib – Add alphabetical headers into citations

Al­phaBib is a bash script that adds al­pha­bet­i­cal head­ers into BibTeX bib­li­ogra­phies; such head­ers can as­sist search­ing in a large list of ci­ta­tions. Al­phaBib takes a bib­li­og­ra­phy pro­duced by BibTeX (the .bbl file), and cre­ates a new file with the al­pha­betic head­ers in­serted.