Lectures Delivered at the Royaumont Seminar, Royaumont, 25 26 June 1974
Automotive Electronics II, International Congress, Detroit, 24-28 Febr., 75
Transport for disabled people : disabled people and cars ; ECMT seminar, 12th - 13th April 1988
Transport for people with mobility handicaps : information and communication
Prospects for East-West European transport : International seminar Paris 6th - 7th December 1990
Güterverkehrsströme in Europa : Horizont 2000 plus; 2. - 3. April 1992 in Nürnberg