@misc{appel_an_electron_2004, 
author={Appel, F.},
title={An Electron Microscope Study of Mechanical Twinning and Fracture in a Precipitation–Hardened TiAl Alloy},
year={2004},
howpublished = {conference lecture: Boston, MA (USA); 29.11.-01.12.2004},
note = {Online available at: \url{} (DOI). Appel, F.: An Electron Microscope Study of Mechanical Twinning and Fracture in a Precipitation–Hardened TiAl Alloy. Materials Research Society Fall Meeting 2004. Boston, MA (USA), 2004.}}