@misc{schwalbe_fracture_mechanics_1998, 
author={Schwalbe, K.-H.},
title={Fracture Mechanics and Fatigue II},
year={1998},
howpublished = {lecture: TUHH, FB Maschinenbau; SS 1998},
note = {Online available at: \url{} (DOI). Schwalbe, K.: Fracture Mechanics and Fatigue II. TUHH, FB Maschinenbau, 1998.}}