Technological developments resulting from the integration of the European transformation systems, with special emphasis on general aviation/regional air traffic, April 29-30, 1993, Friedrichshafen: Proceedings [Text] / Deutsche Gesellschaft für Luft-und Raumfahrt-Lilienthal-Oberth. - Bonn : [б.в.], 1993. - 254 p.: ill. - (DGLR-Bericht 93-01). - ISBN 3-922010-78-4