@misc{wilken_mercury_and_1991, author={Wilken, R.-D.}, title={Mercury and mercury species analysis}, year={1991}, howpublished = {conference lecture: Salvador, Bahia (BR); October 4, 1991}, note = {Online available at: \url{} (DOI). Wilken, R.: Mercury and mercury species analysis. 3rd International Environmental Congress. Salvador, Bahia (BR), 1991.}}