@misc{schwalbe_fracture_mechanics_1998, 
author={Schwalbe, K.-H.},
title={Fracture Mechanics and Fatigue I},
year={1998},
howpublished = {lecture: TU Hamburg-Harburg, FB Maschinenbau; WS 1998-1999},
note = {Online available at: \url{} (DOI). Schwalbe, K.: Fracture Mechanics and Fatigue I. TU Hamburg-Harburg, FB Maschinenbau, 1998.}}