1. R. Zwanzig: J. Chem. Phys. 33, 1338 (1960)
2. L. van Hove: Physica 21, 517 (1955)
3. D. Sette: In: Physics of Simple Liquids, ed. by H. N. V. Temperley, J. S. Rowlinson, G. S. Rushbrooke (North Holland, Amsterdam 1968) p. 325
4. K. F. Herzfeld, T. A. Litovitz: Absorption and Dispersion of Ultrasonic Waves (Academic Press, New York 1959)
5. E. Sittig: Acustica 10, 81 (1960)