@misc{schwalbe_fracture_mechanics_2001, 
author={Schwalbe, K.-H.},
title={Fracture Mechanics and Fatigue II},
year={2001},
howpublished = {lecture: TUHH, FB Maschinenbau; SS 2001},
note = {Online available at: \url{} (DOI). Schwalbe, K.: Fracture Mechanics and Fatigue II. TUHH, FB Maschinenbau, 2001.}}