@misc{kocak_effect_of_1990, 
author={Kocak, M., Yao, S., Schwalbe, K.-H., Walter, F.},
title={Effect of crack depth (a/W) on weld metal fracture toughness},
year={1990},
howpublished = {GKSS report},
note = {Kocak, M.; Yao, S.; Schwalbe, K.; Walter, F.: Effect of crack depth (a/W) on weld metal fracture toughness. In: Kocak, M. (Ed.): Proceedings of the International Conference WELDING-90: Technology, Material, Fracture. Geesthacht (D). 1990. 255-268.}}