article a.reference.external::after {
      content: url('data:image/svg+xml,<svg width="12" height="12" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="1.5" stroke="%23607D8B" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z"/><path d="M11 7h-5a2 2 0 0 0 -2 2v9a2 2 0 0 0 2 2h9a2 2 0 0 0 2 -2v-5" /><line x1="10" y1="14" x2="20" y2="4" /><polyline points="15 4 20 4 20 9" /></svg>');
      margin: 0 0.1em;
      vertical-align: middle;
}