@misc{schwalbe_efam_etm_1998, 
author={Schwalbe, K.-H.,Zerbst, U.,Kim, Y.-J.,Brocks, W.,Cornec, A.,Heerens, J.,Amstutz, H.},
title={EFAM ETM 97 - the ETM method for assessing the significance of crack-like defects in engineering structures, comprising the versions ETM 97/1 and ETM 97/2},
year={1998},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Schwalbe, K.; Zerbst, U.; Kim, Y.; Brocks, W.; Cornec, A.; Heerens, J.; Amstutz, H.: EFAM ETM 97 - the ETM method for assessing the significance of crack-like defects in engineering structures, comprising the versions ETM 97/1 and ETM 97/2. GKSS 98-E-6. 1998.}}