I'm editing a LaTeX document with a 100+ entry bibliography.
Unfortunately, the bibliography is coded with bibitems in a thebibliography environment.
I'm wondering if there is a 'smooth' upgrade path to BibTeX such as a free-text entry. I did some googling, but didn't find something useful.
This would allow to already benefit from features such as automatic sorting of the entries. Of course features that rely on the database -- such as changing the format of the entries -- couldn't be used at that point. But still, such a free-style entry would already help a lot at the current stage.
Addition after posting: My final goal is to have a BibTex database that uses the standard database entries. But for the transition, I'm wonding if I could avoid generating the full-blown BibTeX database in the beginning. I'm definitely planning to do that, but only in the future.

bibtexdoes, converting abblfile to abibfile. This question looks VERY similary: https://tex.stackexchange.com/questions/203177/ – bers Jun 18 '15 at 17:17thebibliographyentries into Author etc. – Christoph Jun 18 '15 at 17:50