@misc{schwalbe_the_crack_1995, 
author={Schwalbe, K.-H.},
title={The crack tip opening displacement and J  Integral under strain control and fully plastic conditions estimated by the engineering treatment model for plane stress tension},
year={1995},
howpublished = {GKSS report},
note = {Schwalbe, K.: The crack tip opening displacement and J  Integral under strain control and fully plastic conditions estimated by the engineering treatment model for plane stress tension. In: Landes, J.; McCabe, D.; Boulet, J. (Ed.): Fracture Mechanics: Twenty-Fourth Volume. 1995. 636-651.}}