Discrete rearranging disordered patterns, part II: 2D plasticity, elasticity and flow of a foam P. Marmottant, C. Raufaste and F. Graner Eur. Phys. J. E, 25 4 (2008) 371-384 Published online: 30 April 2008 DOI: 10.1140/epje/i2007-10300-7