@misc{scharf_the_history_1992, 
author={Scharf, B. W.},
title={The history of limnological investigations},
year={1992},
howpublished = {journal article,GKSS report},
note = {Online available at: \url{} (DOI). Scharf, B.: The history of limnological investigations. Archiv fuer Hydrobiologie. 1992. vol. 38, 1-9.}}