1. FAA/Eurocontrol, 2001, "Principles of Operation for the Use of Airborne Separation Assurance Systems",FAA/EurocontrolCooperative R&D.
2. Grimaud, I., Hoffman, E., Rognin, L., Zeghal, K., 2001, "Delegating upstream - Mapping where it happens", USA/Europe Air Traffic Management R&DSeminar,SantaFe,USA.