1. Measurement of gas by multipath ultrasonic meters, American Gas Association. A. G. A. Report No.9; 1998.
2. Walsh JT. A Report of Acoustic Transit Time Accuracy Field Work Performed in North America, 5th International Conference on Hydraulic Efficiency Measurements, Lucerne, Switzerland; Jul 14–16, 2004.
3. Barton NA, Brown GJ. Velocity distribution effects on ultrasonic flowmeters—Part 2 Determination by computational and experimental methods. Report No. 358/99, National Measurement System Policy Unit DTI, London; Sep 20, 1999.
4. Barton NA, Boam D, In-service performance of ultrasonic flowmeters—Application and validation of CFD modeling methods, Report No. 2002/72, National Measurement System Directorate. London; Nov 26, 2002.
5. Installation effects on ultrasonic and electromagnetic flowmeters: a model-based approach;Halttunen;Flow Measurement and Instrumentation,1990