@misc{schwalbe_gkss_experience_2008, 
author={Schwalbe, K.-H., Brocks, W., Zerbst, U., Schoedel, M.},
title={GKSS Experience with Determination and Application of the Crack-Tip Opening Angle},
year={2008},
howpublished = {conference lecture (invited): Denver, CO (USA);},
note = {Schwalbe, K.; Brocks, W.; Zerbst, U.; Schoedel, M.: GKSS Experience with Determination and Application of the Crack-Tip Opening Angle. CTOA Applications in Pipeline and Aerospace Structures, Symposium. Denver, CO (USA), 2008.}}