Global validity of the Master kinetic equation for hard-sphere systems M. Tessarotto, C. Cremaschini, C. Asci, A. Soranzo and G. Tironi Eur. Phys. J. Plus, 130 8 (2015) 169 Published online: 24 August 2015 DOI: 10.1140/epjp/i2015-15169-2