W. Reichardt, ' Woordenboek Akoestiek - viertalig - Engels,Duits, Frans,Nederlands ', Matinus Nijhoff Publishers, Kluwer Technische Boeken, 1983.
I.U.P.A.P., Symbols, units, nomenclature and fundamental constants in physics, Document 25, 1987.
V. W. Sparrow, D.A. Russel, Animations created in Mathematica for Acoustics Education, prceedings of ICA-98, pp. 2075-2077, Seattle.