1. ICAO, Doc. 9971 - Manual on Collaborative Air Traffic Flow Management, The International Civil Aviation Organization (ICAO), 2nd ed, 2014.
2. ICAO, Doc. 9965 - Manual on Flight and Flow Information for a Collaborative Environment, The International Civil Aviation Organization (ICAO), disclosed draft ed., Montreal, Canada, 2012.
3. ICAO, Doc. 9854 - Global Air Traffic Management Operational Concept, The International Civil Aviation Organization (ICAO), Montreal, Canada, 2005.
4. NextGen Implementation Plan, Federal Aviation Administration (FAA), Washington DC, USA, 2013.
5. C.Nickol, Environmentally Responsible Aviation (ERA) Project, 2011.