reftex: Chapterbib and Bibunits

 
 4.4 Chapterbib and Bibunits
 ===========================
 
 ‘chapterbib’ and ‘bibunits’ are two LaTeX packages which produce
 multiple bibliographies in a document.  This is no problem for RefTeX as
 long as all bibliographies use the same BibTeX database files.  If they
 do not, it is best to have each document part in a separate file (as it
 is required for ‘chapterbib’ anyway).  Then RefTeX will still scan the
 locally relevant databases correctly.  If you have multiple
 bibliographies within a _single file_, this may or may not be the case.