1. On implementation of Council Directive 91/676/EEC concerning the protection of waters against pollution caused by nitrates from agricultural sources based on Member State reports for the period 2004–2007;R.f.t.C.t.t.C.a.t.E. Parliament,2010
2. Elevated Nitrogen and Phosphorus Still Widespread in Much of the Nation's Streams and Groundwater;U.S.G.S.,2010
3. Kinetics of nitrate reduction in monolith reactor;Warna;Chemical Engineering Science,1994
4. L.W. Canter, Nitrates in Groundwater, CRC Press, Boca Raton, 1996.
5. Guidelines for Canadian Drinking Water Quality;Canada,1996