@misc{paul_membrane_technology_2002, 
author={Paul, D.},
title={Membrane technology  for clean production},
year={2002},
howpublished = {conference lecture (invited): Mexiko-City (MEX); 18.-20.03.2002},
note = {Online available at: \url{} (DOI). Paul, D.: Membrane technology  for clean production. AchemAmerica 2002. Mexiko-City (MEX), 2002.}}