@misc{schwalbe_fracture_mechanics_2003, 
author={Schwalbe, K.-H.},
title={Fracture Mechanics and Fatigue I},
year={2003},
howpublished = {lecture: TU Hamburg-Harburg, FB Maschinenbau; WS 2003-2004},
note = {Online available at: \url{} (DOI). Schwalbe, K.: Fracture Mechanics and Fatigue I. TU Hamburg-Harburg, FB Maschinenbau, 2003.}}