bibtex-autokey-abbrevbibtex-autokey-abbrev is a compiled Lisp function in `
bibtex.el'. (bibtex-autokey-abbrev STRING LEN) Return an abbreviation of STRING with at least LEN characters. If LEN is positive the abbreviation is terminated only after a consonant or at the word end. If LEN is negative the abbreviation is strictly enforced using abs (LEN) characters. If LEN is not a number, STRING is returned unchanged.