blip.tv/file/3414004
www.darkreading.com/blog/archives/2010/04/attacking_door.html
www.securityinfowatch.com/Executives+Columns+%2526+Features/1316527?pageNum=2
www.slideshare.net/shawn_merdinger/we-dont-need-no-stinkin-badges-hacking-electronic-door-access-controllersquot-shawn-merdinger-carolinacon
exchange.xforce.ibmcloud.com/vulnerabilities/59828