@misc{bewersdorff_the_contribution_2008, 
author={Bewersdorff, I.,Aulinger, A.,Matthias, V.,Quante, M.},
title={The contribution of ship exhaust to air pollution in North Sea coastal areas},
year={2008},
howpublished = {conference lecture: Graz (A); 16.-17.06.2008},
note = {Online available at: \url{} (DOI). Bewersdorff, I.; Aulinger, A.; Matthias, V.; Quante, M.: The contribution of ship exhaust to air pollution in North Sea coastal areas. 17th International Symposium on Transport and Air Pollution. Graz (A), 2008.}}