@misc{siegmund_two_models_1998, 
author={Siegmund, T., Bernauer, G., Brocks, W.},
title={Two models of ductile fracture in contest: porous metal plasticity and cohesive elements},
year={1998},
howpublished = {conference lecture: Sheffield (GB);},
note = {Siegmund, T.; Bernauer, G.; Brocks, W.: Two models of ductile fracture in contest: porous metal plasticity and cohesive elements. In: Brown, M.; Rios, E. (Ed.): ECF 12: Fracture from Defects; Proceedings of the 12th Bienniel Conference on Fracture - ECF 12. Sheffield (GB). 1998. 933-938.}}