    allowHTML: true,
          content: refHtml,
          maxWidth: 500,
          interactive: true,
          interactiveBorder: 10,
          theme: 'light-border',
          placement: 'bottom-start'
        });
      });

      // fix footnotes in tables (#411)
      // replacing broken distill.pub feature
      $('table d-footnote').each(function() {
        // we replace internal showAtNode methode which is triggered when hovering a footnote
        this.hoverBox.showAtNode = function(node) {
      