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