title: LaTeX IEEEtran-de: Add URL access date
body: <p>I'm using the IEEEtran-de package and need to add the term</p>
  <blockquote>
  <p>Zugriff am: DD. MM YYYY</p>
  </blockquote>
  <p>(URL access date) behind the URL. I tried to look up the IEEEtran-de.bst code and search for the relevant lines, but I'm pretty overstrained ...</p>
  <p>Is someone familiar with this package and can help me out?</p>