@misc{markert_normalization_and_1989, 
author={Markert, B., Piehler, H., Lieth, H., Sugimae, A.},
title={Normalization and calculation of lanthanide element concentrations in environmental samples},
year={1989},
howpublished = {journal article},
note = {Markert, B.; Piehler, H.; Lieth, H.; Sugimae, A.: Normalization and calculation of lanthanide element concentrations in environmental samples. Radiation and Environmental Biophysics. 1989. vol. 28, 213-221.}}