Frontiers of Power Technology Conf. Proc., Oklahoma, 28 - 29Oct., 1968
11th Intersociety Energy Conversion Eng. Conf. Proc., State Line, 12-17 Sept., 1976
IEE colloquium on control aspects of hybrid vehicles, 9 May 1978
Energiespeicherung für elektrische Netze : Tagung Gelsenkirchen, 10. und 11. November 1998