=== scirefs (only strings) ===
* '''CITATION_DESCRIPTION'''
** XML 4.3, 4.4, 4.5
*** <code>//us-bibliographic-data-grant/us-references-cited/us-citation/nplcit/othercit</code>
** XML 4.0, 4.1, 4.2
*** <code>//us-bibliographic-data-grant/references-cited/citation/nplcit/othercit</code>
** APS
*** ?
=== inventors (only strings) ===