@misc{schwalbe_justification_delta5_1991, 
author={Schwalbe, K.-H.},
title={Justification Delta5 as an Operational Definition of the CTOD and its Practical Use},
year={1991},
howpublished = {conference lecture: Indianapolis, IN (USA); 06.-09.05.1991},
note = {Online available at: \url{} (DOI). Schwalbe, K.: Justification Delta5 as an Operational Definition of the CTOD and its Practical Use. ASTM Meeting Committee E24. Indianapolis, IN (USA), 1991.}}