1. G. Haines, Sound Underwater, David & Charles, Newton Abbott, 1974
2. R.J. Urick, Underwater Sound for Engineers, McGraw-Hill, New York, 1975
3. W.S. Burdic, Underwater Acoustic System Analysis, Prentice-Hall, New Jersey, 1984
4. V.M. Albers, Underwater Sound, Dowden Hutchinson and Ross, Stroudsberg, Penn., 1972
5. E. MacCurdy, The Notebooks of Leonardo da Vinci, Garden City Publishing Co., New York, 1942