@misc{schwalbe_the_gkss_1993, 
author={Schwalbe, K.-H.},
title={The GKSS test procedure for determining the fracture behaviour of materials: a unified test method},
year={1993},
howpublished = {conference lecture: Dallas, TX (USA); November 15-18, 1993},
note = {Online available at: \url{} (DOI). Schwalbe, K.: The GKSS test procedure for determining the fracture behaviour of materials: a unified test method. ASTM Fall Meeting. Dallas, TX (USA), 1993.}}