@misc{schwalbe_fundamentals_and_2001, 
author={Schwalbe, K.-H.},
title={Fundamentals and Applications of Fracture Mechanics},
year={2001},
howpublished = {lecture: Universitaet Maribor;},
note = {Schwalbe, K.: Fundamentals and Applications of Fracture Mechanics. Universitaet Maribor, 2001.}}