@misc{ainsworth_crack_driving_2003, 
author={Ainsworth, R.A., Schwalbe, K.-H., Zerbst, U.},
title={Crack driving force estimation methods},
year={2003},
howpublished = {GKSS report},
note = {Ainsworth, R.; Schwalbe, K.; Zerbst, U.: Crack driving force estimation methods. In: Milne, I.; Ritchie, R.; Karihaloo, B. (Ed.): Comprehensive Structural Integrity - Practical Failure Assessment Methods. Oxford: Elsevier. 2003. 133-176.}}