@misc{wilken_mercury_species_1992, 
author={Wilken, R.-D.},
title={Mercury species analysis in contaminated areas},
year={1992},
howpublished = {conference lecture: Belem (BR);},
note = {Wilken, R.: Mercury species analysis in contaminated areas. 32. Congresso de Química do Brasil. Belem (BR), 1992.}}