1. Process Measurement and Analysis;Liptak,1999
2. Process/Industrial Instruments and Controls Handbook;Considine,1974
3. Principles of Measurement Systems;Bentley,1995
4. Measurement Systems: Application and Design;Doeblin,1990
5. R. Ramaswami, K. Sivrajan, Components, in Optical Network, 3rd ed. Burlington, USA, 2010, pp. 141-145. (ch.3.3.7)