@misc{schwalbe_the_etm_1998, 
author={Schwalbe, K.-H., Zerbst, U., Brocks, W., Cornec, A., Heerens, J., Amstutz, H.},
title={The ETM method for assessing the significance of crack-like defects in engineering structures},
year={1998},
howpublished = {GKSS report},
note = {Schwalbe, K.; Zerbst, U.; Brocks, W.; Cornec, A.; Heerens, J.; Amstutz, H.: The ETM method for assessing the significance of crack-like defects in engineering structures. Fatigue and Fracture of Engineering Materials and Structures. 1998. vol. 21, no. 10, 1215-1232.}}