@misc{markert_multielement_analysis_1990, 
author={Markert, B.},
title={Multielement analysis in a forest ecosystem: Variations in chemical composition of trees and ground flora},
year={1990},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Markert, B.: Multielement analysis in a forest ecosystem: Variations in chemical composition of trees and ground flora. Angewandte Botanik. 1990. vol. 64, 19-36.}}