%0 conference lecture (invited) %@ %A Brocks, W., Negre, P., Scheider, I., Schoedel, M., Steglich, D. %D 2003 %J Recent Developments in the Modeling of Rupture in Solids, International Symposium %T Phenomenological and Micromechanical Models for Simulating Ductile Crack Extension in Sheet Metal %U %X