@misc{packroff_faunistic_studies_1992, author={Packroff, G.}, title={Faunistic studies on the ciliates of three Eifel maar lakes}, year={1992}, howpublished = {journal article}, note = {Online available at: \url{} (DOI). Packroff, G.: Faunistic studies on the ciliates of three Eifel maar lakes. Archiv fuer Hydrobiologie. 1992. vol. 38, 209-221.}}