hugo-academic/layouts/partials/footer_container.html

<footer class="site-footer">
  <div class="container">
    <p class="powered-by">

      {{ with .Site.Copyright }}{{ . | markdownify}} &middot; {{ end }}

      Powered by the
      <a href="https://sourcethemes.com/academic/" target="_blank" rel="noopener">Academic theme</a> for
      <a href="https://gohugo.io" target="_blank" rel="noopener">Hugo</a>.

      <span class="pull-right" aria-hidden="true">
        <a href="#" id="back_to_top">
          <span class="button_icon">
            <i class="fa fa-chevron-up fa-2x"></i>
          </span>
        </a>
      </span>

    </p>
  </div>
</footer>

<!-- Citation modal -->
<div id="modal" class="modal fade" role="dialog">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close btn-large" data-dismiss="modal">&times;</button>
        <h4 class="modal-title">{{ i18n "btn_cite" }}</h4>
      </div>
      <div>
        <pre><code class="modal-body tex"></code></pre>
      </div>
      <div class="modal-footer">
        <a class="btn btn-primary btn-outline js-copy-cite" href="#" target="_blank">
          <i class="fa fa-copy"></i> {{ i18n "btn_copy" }}
        </a>
        <a class="btn btn-primary btn-outline js-download-cite" href="#" target="_blank">
          <i class="fa fa-download"></i> {{ i18n "btn_download" }}
        </a>
        <div id="modal-error"></div>
      </div>
    </div>
  </div>
</div>