1. Tenerife disaster http://en.wikipedia.org/wiki/Tenerife_disaster 2012
2. Sentinel event data, root causes by event type 2004-2Q 2012 The Joint Commission www.jointcommission.org/sentinel_event.aspx 2012
3. Agency for Healthcare Research and Quality http://teamstepps.ahrq.gov 2012
4. A practical approach to observation in the emergency care setting;Hohenhaus;J Emerg Nurs,2008