| wldelft.nl | WL Delft Hydraulics |
| wateronline.com | Water Online |
| tno.nl | TNO - Netherlands Organization for Applied Scientific Research |
| tudelft.nl | Department of Sanitary Engineering, TU Delft, Netherlands |
| asse-plumbing.org | American Society of Sanitary Engineering |
| aspe.org | American Society of Plumbing Engineers |
| hydroinformatics.org | Department of Hydroinformatics and Knowledge Management (HIKM) |
| awwa.org | American Water Works Association |
| irc.nl | Home - IRC International Water and Sanitation Centre |
| urban.nl | The International Institute for the Urban Environment |
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