hors') %}
    {%- set authordata = config.contributors[author] if author in config.contributors else None -%}
    <meta name="citation_author" content="{{ authordata.name if authordata.name else author }}">
    {% endfor -%}
    {% if date_published and date_published|length > 10 -%}
    <meta name="citation_publication_date" content="{{ date_published[0:4] }}/{{ date_published[5:7] }}/{{ date_published[8:10] }}">
    {% endif -%}
    <meta name="citation_journal_title" content="{{ self.citation_journal_tit