Veletsos, A.S. <br/><br/>
Vibration of viscoelastic foundations / A.S. Veletsos and B-. Verbic. 

 - Nueva York : John Wiley & Sons. 
 - 16 p. 
<br/><br/> Reprinted from: Earthquake engineering and structural dynam-ics, vol. 2, 87-102 1973.