[1] Dao, C.A., Con, P.M. and Khai, N.M. (2010) Characteristic of Urban Wastewater in Hanoi City—Nutritive Value and Potential Risk in Using for agriculture. VNU Journal of Science, Earth Sciences, 26, 42-47.
[2] Con, P.M., Khai, N.M., Hà, P.Q. and Anh, T.N. (2013) Research on Surface Water Quality in Urban Area of Hanoi City. VNU Journal of Science, 24-30.
[3] Fetter, C.W. (1993) Applied Hydrogeology. Prentice Hall, Upper Saddle River.
[4] Katz, B.G., Coplen, T.B. and Bullen, T.D. (1997) Use of Chemical and Isotopic Tracers to Characterize the Interactions between Ground Water and Surface Water in Mantled Karst. Groundwater, 35, 1014-1028.
http://dx.doi.org/10.1111/j.1745-6584.1997.tb00174.x
[5] Liu, X.C., Xia, J., Song, X.F., Yu, J.J., Tang, C.Y. and Zhan, C.S. (2005) Study of Surface Water and Groundwater Using Isotopes in Huaishahe Basin in Beijing, China. Proceedings of Symposium S3 Held during the Seventh IAHS Scientific Assembly, Foz do Iguacu, Brazil, April.