Your query returned 2 results.

• Coupled Discrete and Continuum Approach to the Behaviour of Ballast,
  M. Hammoud, D. Duhamel, K. Sab and F. Legoll
  Paper 39 from CCP: 89, ISBN 978-1-905088-26-3 (2008)
  
• Dynamic Behaviour of Ballasted Railway Tracks: a Discrete/Continuous Approach,
  L. Ricci, V.H. Nguyen, K. Sab, D. Duhamel and L. Schmitt
  Paper 78 from CCP: 77, ISBN 0-948749-89-X (2003)