1. The sound of rain on a steel roof;Dubout;J. Sound. Vib.,1969
2. Noise of simulated rainfall on roofs;Ballagh;Appl. Acoustics,1990
3. BS 4196: Part 3: 1981,1981
4. The Encyclopedia of Atmospheric Sciences and Astrogeology;Fairbridge,1967
5. An Introduction to Fluid Dynamics;Batchelor,1967