I share a link about including multiple bibliographies in one document.
I show how it’s possible to use foreign languages in the bibliography.
I show how to add diacritics in authors’ names in the bibliography.
I show how multiple bibliography files can be included in one document without causing problems (with natbib).
I show how to fix a mysterious-sounding error.
BibTeX likes to make non-initial capital letters lower case. I show how to defeat BibTeX’s stubbornness.