@misc{nikishkov_transformation_of_1999, 
author={Nikishkov, G.,Heerens, J.,Schwalbe, K.-H.},
title={Transformation of CTOD Delta5 to CTOD DeltaBS and J-integral for 3PB- and CT-Specimens},
year={1999},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Nikishkov, G.; Heerens, J.; Schwalbe, K.: Transformation of CTOD Delta5 to CTOD DeltaBS and J-integral for 3PB- and CT-Specimens. Engineering Fracture Mechanics. 1999. vol. 63, 573-589.}}