@misc{appel_the_physical_2003, 
author={Appel, F.},
title={The Physical Metallurgy of TiAl Alloys: Hot Working and Diffusion Bonding},
year={2003},
howpublished = {conference lecture (invited): Halle / Saale (D); 20.06.2003},
note = {Online available at: \url{} (DOI). Appel, F.: The Physical Metallurgy of TiAl Alloys: Hot Working and Diffusion Bonding. Kolloquiumsvortrag am Max-Planck-Institut fuer Mikrostrulturforschung. Halle / Saale (D), 2003.}}