Revista de contratos públicos / dir. Pedro Costa Gonçalves
Revue du marché commun et de l'Union Européenne / prop. Éditions Techniques et Économiques
Aeronautical Telecommunications : International standards and recommended practices: Annex 10 to the Convention on International Civil Aviation / International Civil Aviation Organization
Surveillance radar and collision avoidance systems : aeronautical telecommunications: annex 10 to the Convention on International Civil Aviation: volume IV / International Civil Aviation Organization