@misc{schwalbe_the_engineering_1991, 
author={Schwalbe, K.-H., Cornec, A.},
title={The engineering treatment model (ETM) and its practical application},
year={1991},
howpublished = {GKSS report},
note = {Schwalbe, K.; Cornec, A.: The engineering treatment model (ETM) and its practical application. Fatigue and Fracture of Engineering Materials and Structures. 1991. vol. 14, 405-412.}}