Is the Critical State Critical?
A. Tordesillas, T.  Tshaikiwsky and D. Walker

Fundamental Quantitative Verification of Numerical Experiments by DEM
K. Suzuki

Micromechanics Study of Elastic Behaviour of Granular Materials
N.P. Kruyt

Micromechanical Interpretation of the Ratcheting Phenomenon in Granular Materials
F. Calvetti and C. di Prisco

Three Dimensional Discrete Elements Modeling of Undrained Montonic and Cyclic Response of Granular Media - Micromechanical Perspective
B. Ferdowsi, A. Soroush and R. Shafipour