@misc{merico_biogeochemical_cycles_2008, 
author={Merico, A.},
title={Biogeochemical cycles and Earth system science: Part 3: Nitrogen Cycle},
year={2008},
howpublished = {lecture: Universitaet Kiel, FB Mathematisch-naturwissenschaftliche Fakultaet;},
note = {Merico, A.: Biogeochemical cycles and Earth system science: Part 3: Nitrogen Cycle. Universitaet Kiel, FB Mathematisch-naturwissenschaftliche Fakultaet, 2008.}}