bibtex-entry-indexbibtex-entry-index is a compiled Lisp function in `
bibtex.el'. (bibtex-entry-index) Return index of BibTeX entry head at or past position of point. The index is a list (KEY CROSSREF-KEY ENTRY-TYPE) that is used for sorting the entries of the BibTeX buffer. CROSSREF-KEY is nil unless the value of `bibtex-maintain-sorted-entries' is `crossref'. Move point to the end of the head of the entry found. Return nil if no entry found.