@misc{rhein_thalliumatomdampffilter__1990, 
author={Rhein, D.},
title={Thallium-Atomdampffilter},
year={1990},
howpublished = {conference lecture: Hamburg (D); 16.05.1990},
note = {Online available at: \url{} (DOI). Rhein, D.: Thallium-Atomdampffilter. Seminar ueber Umweltphysik der Universitaet Hamburg. Hamburg (D), 1990.}}