Zotero: handle special case if DOI instead of URL is returned when processing multiple results
Zotero: handle special case if DOI instead of URL is returned when processing multiple results

ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools