@misc{ohlrogge_sewage_water_2003, 
author={Ohlrogge, K.,Wind, J.,Martin, D.,Hackner, T.},
title={Sewage water treatment by means of vacuum rotation membrane technology},
year={2003},
howpublished = {conference object: Frankfurt / M (D); 22.05.2003},
note = {Online available at: \url{} (DOI). Ohlrogge, K.; Wind, J.; Martin, D.; Hackner, T.: Sewage water treatment by means of vacuum rotation membrane technology. ACHEMA Kongress. Frankfurt / M (D), 2003.}}