tering references is done like this:
<br/>
<span class="pre-in-pp">
  .REF
  .[
  keyword(s)
  .]
  .REF
</span>
If FOOTNOTE_REFS is in effect, the reference between the first
and second <kbd>.REF</kbd> will be treated as a footnote.  If
ENDNOTE_REFS, it will be treated as an endnote.  Endnote references
must be explicitly output with
<a href="docelement.html#ENDNOTES">ENDNOTES</a>
at the end of your file, before
<a href="tables-of-contents.html#TOC">TOC</a>.
</p>

<div class="box-important">
<p class="tip"