1. Creep and adiabatic temperature effects in elastic materials;Bethe;Proc. 8th Conf. IMEKO, TC 3, Krakow, Poland,1980
2. Möglichkeiten und Probleme nichtmetallischer Federwerkstoffe in Kraft- oder Druck-aufnehmern;Bethe;Proc. NTG/GMR-Fachtagung ‘Sensoren’, Bad Nauheim, F.R.G.,1986
3. Mechanical problems in measuring force and mass;Bethe;Proc. XIth Conf. Measuring of Force and Mass, Amsterdam, The Netherlands,1986