Error I got when trying to use <a href="//commons.wikimedia.org/wiki/User:Smith609" title="User:Smith609">Martin Smith's</a> <a href="//commons.wikimedia.org/w/index.php?title=User:Citation_bot&amp;action=edit&amp;redlink=1" class="new" title="User:Citation bot (page does not exist)">Citation bot</a>.
Either Smith609 or Toollabs, probably both
screenshot of <a class="external autonumber" href="https://tools.wmflabs.org/citations/process_page.php">[1]</a>