North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Guidance and Control Panel. Symposium (51st : 1990 : Instituto Nacional de Industria, Madrid)
North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Guidance and Control Panel. Symposium (59th : 1994 : Rome, Italy)
North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Guidance and Control Panel. Symposium (46th : 1988 : Geilo, Norway)
North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Guidance and Control Panel. Symposium (50th : 1990 : Çeşme/Izmir, Turkey)
North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Guidance and Control Panel. Symposium (52nd : 1991 : Helexpo, Thessaloniki, Greece)
North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Guidance and Control Panel. Symposium (47th : 1988 : San Francisco, California)