@misc{heerens_punch_test_2001, 
author={Heerens, J., Steglich, D., Brocks, W.},
title={Punch Test for the Simulation of Ship's Hull Damage},
year={2001},
howpublished = {conference paper: Freiburg (D);},
note = {Heerens, J.; Steglich, D.; Brocks, W.: Punch Test for the Simulation of Ship's Hull Damage. In: 13.deutschsprachiges ABAQUS Anwendertreffen. Freiburg (D). 2001.}}