amsrefs is a bibliography formatting package provided by the AMS which supports inclusion of structured bibliographic information either directly in a LaTeX document file, or in a separate database.
Usage details are contained in the User's guide to the
amsrefs package includes an export facility to convert a BibTeX database to the
amsrefs format in a file named
.bbl; the format of this file is different from the BibTeX file of the same name; no back-converter is provided.