@misc{schwalbe_classical_fracture_2007, 
author={Schwalbe, K.-H., Landes, J.D., Heerens, J.},
title={Classical Fracture Mechanics Methods},
year={2007},
howpublished = {GKSS report},
note = {Schwalbe, K.; Landes, J.; Heerens, J.: Classical Fracture Mechanics Methods. In: Comprehensive Structural Integrity - Mechanical Characterisation of Materials. 2007. 3-42.}}