@misc{wilken_mercury_problems_1994, 
author={Wilken, R.-D.},
title={Mercury problems in Germany and mercury species analysis},
year={1994},
howpublished = {conference lecture: Sao Paolo (BR);},
note = {Wilken, R.: Mercury problems in Germany and mercury species analysis. Vortrag am Institut fuer Chemie der Universitaet von Campinas. Sao Paolo (BR), 1994.}}