5Hill R A. 1940. Geochemical Patterns in the Coachella Valley, California[J]. Trans Am Geophys Union, 21:46 49.
6Piper A M. 1944. A Graphic Procedure in Geochemical Interpretation of Water Analyses [J]. Trans Am Geophys Union, 25: 914- 923.
7Durov S A. 1948. Natural Waters and Graphic Representation of Their Compositions [J]. Dokl Akad Nauk Ssssr, 59: 87--90.
8Chadha D K. 1999, A Proposed New Diagram for Geochemical Classification of Natural Waters and Interpretation of Chemical Data[J]. Hydrogeology Journal, 7:431 - 439.
9Mahbub Hussain, Syed Munaf Ahmed, Walid Abderrahman.2008. Cluster analysis and quality assessment of logged water at an irrigation project, eastern Saudi Arabia [J]. Journal of Environmental Management. 86:297-307.
10Dasapta Erwin Irawan, Deny Juanda Puradimaja, Sudarto Notosiswoyo.ect.2009. Hydrogeochemistry of volcanic hydrogeology based on cluster analysis of Mount Ciremai, West Java, Indonesia[J].Joumal of Hydrology, 396: 221-234.