@misc{markert_some_aspects_1988, 
author={Markert, B.,Steinbeck, R.},
title={Some aspects of element distribution in Betula alba: A contribution to representative sampling of terrestrial plants for multi-element analysis},
year={1988},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Markert, B.; Steinbeck, R.: Some aspects of element distribution in Betula alba: A contribution to representative sampling of terrestrial plants for multi-element analysis. Fresenius Journal of Analytical Chemistry. 1988. vol. 331, 616-619.}}