*[http://www.vieuzordiland.fr/index.php?option=com_content&task=view&id=23&Itemid=34 Vieuxzordiland's page on the matter. In French]
*http://v3.espacenet.com/publicationDetails/biblio?CC=GB&NR=2243701A&KC=A&FT=D&date=19911106&DB=&locale= link to a patent rumoured to be ACID's patent.
*[http://cpcwiki.eu/forum/index.php/topic,410.0.html| The CPCwiki's forum thread featuring the Epic fight between the infamous ACID and NoCa$h.]