@misc{petersen_mercury_modelling_2001, 
author={Petersen, G.},
title={Mercury Modelling: Progress and Problems},
year={2001},
howpublished = {conference lecture: Roskilde (DK);},
note = {Petersen, G.: Mercury Modelling: Progress and Problems. MEPOP-NMR-AMAP; Mercury and POP Workshop. Roskilde (DK), 2001.}}