@misc{schwalbe_estimating_the_1993, 
author={Schwalbe, K.-H.},
title={Estimating the load line displacement of cracked laboratory specimens using the engineering treatment model (ETM)},
year={1993},
howpublished = {GKSS report},
note = {Schwalbe, K.: Estimating the load line displacement of cracked laboratory specimens using the engineering treatment model (ETM). Engineering Fracture Mechanics. 1993. vol. 45, no. 6, 751-758.}}