1. Participation preferred. Philadelphia strives for balance and teamwork to restore an urban watershed;Neukrug;Water Environ. Technol., June,2004
2. Les chercheurs se mouillent pour le fleuve;Chocat;Isotopes,2001
3. Standard Methods for the Examination of Water and Wastewater;APHA,1998
4. Nitrogen removal in artificial wetlands;Gersberg;Water Res.,1983
5. Nitrogen removal in constructed wetlands employed to treat domestic wastewater;Huang;Water Res.,2000