stv.tv Google and Yahoo countersue Xerox in patent spatV3.co.ukThe lawsuit states that search requests in AdSense and AdWords violate Xerox's automatically generating queries technology.Yahoo, Google and YouTube countersue Xerox in patent disputeRochester Democrat and ChronicleGoogle and Yahoo hit back at Xerox lawsuitPC ProGoogle, Yahoo Countersue Xerox Over Patent ClaimsWebProNews (blog)Reuters