Bibliography:
1. Sadhu, Ultra-Sonic Velocity Studies in Liquids and Their Correlation. City: Gyan Publishing House, 1987.
2. Acoustics, Waves and Oscillations. New York: Wiley, 1990.
3. Garg, Suresh. Oscillations and Waves. City: Phi Learning, 2009.
Webliography:
1. www.measurement.sk/2009/S1/Konkov.pdf
2. vtuphysicslab.blogspot.com/2008/08/5.html