@misc{boeddeker_membrane_technology_1998, 
author={Boeddeker, K.W.},
title={Membrane Technology},
year={1998},
howpublished = {lecture: Universidad Technica Federico Santa Maria; SS 1998},
note = {Online available at: \url{} (DOI). Boeddeker, K.: Membrane Technology. Universidad Technica Federico Santa Maria, 1998.}}