@misc{markert_multielementanalytik_in_1989, 
author={Markert, B.},
title={Multielementanalytik in Oekosystemen},
year={1989},
howpublished = {journal article},
note = {Markert, B.: Multielementanalytik in Oekosystemen. Uni Osnabrueck. 1989. vol. 1, no. 2, 6-9.}}