Scaling of Rough Surfaces: Effects of Surface Diffusion on Growth and   Roughness Exponents
  Random deposition model with surface diffusion over several next nearest neighbours is studied. The results agree with the results obtained by Family for the case of nearest neighbour diffusion [F. Family, J. Phys. A 19(8), L441, 1986]. However for larger diffusion steps, the growth exponent and the roughness exponent show interesting dependence on diffusion length. 
Baisakhi Mal, Subhankar Ray, J. Shamanna