@misc{markert_presence_and_1993, 
author={Markert, B.},
title={Presence and significance of naturally occuring chemical elements of the periodic system in the plant organism},
year={1993},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Markert, B.: Presence and significance of naturally occuring chemical elements of the periodic system in the plant organism. Vegetatio. 1993. vol. 103, 1-30.}}