# Add OpenAlex fields to summary (example; you may already have custom summary rendering)
# If you use summary_page.xml approach, keep it there instead.
$c->{render_citation_link_openalex} = sub
{
    my( $repo, $eprint ) = @_;

    return undef unless $eprint->is_set( "openalex_id" );

    my $id = $eprint->get_value( "openalex_id" );

    my $link = $repo->make_element(
        "a",
        href => "https://openalex.org/$id",
        target => "_blank"
    );

    $link->appendChild( $repo->make_text( "View in OpenAlex" ) );

    return $link;
};