@misc{ohlrogge_membrane_separation_1998, 
author={Ohlrogge, K.,Paul, D.},
title={Membrane separation processes for clean production},
year={1998},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Ohlrogge, K.; Paul, D.: Membrane separation processes for clean production. Environmental Progress. 1998. vol. 17, no. 3, 137.}}