@misc{xu_constitutive_behaviour_2010, 
author={Xu, S.,Tyson, W.,Martin, P.,Petri, N.},
title={Constitutive Behaviour and Crack Tip Opening Angle of Ultra High Strength Steel Sheets},
year={2010},
howpublished = {conference lecture: Detroit, MI (USA); 13.-15.04.2010},
note = {Online available at: \url{} (DOI). Xu, S.; Tyson, W.; Martin, P.; Petri, N.: Constitutive Behaviour and Crack Tip Opening Angle of Ultra High Strength Steel Sheets. SAE 2010 World Congress & Exhibition. Detroit, MI (USA), 2010.}}