docs: def _bibliography(doc, terms, converters=[], format='html'):
      """
      Render citations, from a document or a doct of dicts
  
      If the input is a dict, each key is the name of the citation, and the value is a BibTex
      formatted dict
  
      :param doc: A MetatabDoc, or a dict of BibTex dicts
      :return:
      """
  
      output_backend = 'latex' if format == 'latex' else MetatabHtmlBackend
  
      def mk_cite(v):
          for c in converters:
              r = c(v)
  
              if r is not False:
                  return r
  
          return make_citation_dict(v)
  
      if isinstance(doc, MetatabDoc):
          # This doesn't work for LaTex, b/c the formatter adds the prologue and epilogue to eery entry
  
          d = [mk_cite(t) for t in terms]
  
          cd = {e['name_link']: e for e in d}
  
      else:
  
          cd = {k: mk_cite(v, i) for i, (k, v) in enumerate(doc.items())}
  
      # for k, v in cd.items():
      #    print (k, v)
  
      return PybtexEngine().format_from_string(safe_dump({'entries': cd}),
                                               style=MetatabStyle,
                                               output_backend=output_backend,
                                               bib_format='yaml')