Journal Article
                        
                        Erni, Marco, Pay  Drechsel, Hans-Peter  Bader, Ruth  Scheidegger, Christian  Zurbruegg, and Rolf  Kipfer.  
"Bad for the environment, good for the farmer? Urban sanitation and nutrient flows." Irrigation and drainage systems 24, no. 1-2 (2010): 113-125.