@misc{neidhart_analytical_and_1999, 
author={Neidhart, B.},
title={Analytical and legal aspects of the threshold limit concept},
year={1999},
howpublished = {conference lecture (invited): Vienna (A); 03.-04.09.1999},
note = {Online available at: \url{} (DOI). Neidhart, B.: Analytical and legal aspects of the threshold limit concept. 4th International Symposium on Philosophy, History and Education in Analytical Chemistry 'Analytical Chemistry and Law'. Vienna (A), 1999.}}