Frechen, F.-B., Schier, W., Romaker, J., Ordonez, J.A., 2013. 3 years of practice experiences with the waterbackpack PAUL - case studies from Colombia, Bénin, and others. in: Proceedings of the International Membrane Science & Technology Conference, 25-29 Nov 2013, Melbourne, Australia, in: Membrane Science & Technology Conference (Hrsg.), Proceedings of the International Membrane Science & Technology Conference. S. TBD.

Frechen, F.-B., Schier, W., Romaker, J., Ordonez, J.A., 2013. Der Ultra Low Pressure Ultra-Filtration-Prozess (ULPUF) zur dezentralen Wasserversorgung in Not-fallsituationen - Prinzip und Praxiserfahrungen., in: Wessling, P. (Hrsg.), Membrantechnik in der Wasseraufbereitung und Abwasserbehandlung. S. 83–93.

Frechen, F.-B., Schier, W., Romaker, J., Ordonez, J.A., 2013. The Ultra Low Pressure Ultrafiltration ULPUF for Decentralized Water Supply in Cases of Emergency. in: Proceedings of the International Membrane Science & Technology Conference, 25-29 Nov 2013, Melbourne, Australia, in: Membrane Science & Technology (Hrsg.), Proceedings of the International Membrane Science & Technology Conference. S. TBD.

Schier, W., Frechen, F.-B., Romaker, J., 2012. The WaterBackpack PAUL: A Low Pressure Ultrafiltration (LPUF) unit for decentralized water supply in emergencies and disasters. Proceedings of the 3rd IWA Regional Conference on Membrane Technology, 03.-06.12.2012, Buenos Aires, Argentina, in: IWA (Hrsg.), Proceedings of the 3rd IWA Regional Conference on Membrane Technology. S. TBD.