@misc{markert_wasseranalytik_ii_1993, 
author={Markert, B.},
title={Wasseranalytik II},
year={1993},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Markert, B.: Wasseranalytik II. Nachrichten aus Chemie, Technik und Laboratorium. 1993. vol. 41, no. 11, M1-M22.}}