Modified Boltzmann Transport Equation and Freeze Out L. P. Csernai, V. K. Magas, E. Molnár, A. Nyiri and K. Tamosiunas Eur. Phys. J. A, 25 1 (2005) 65-73 Published online: 22 July 2005 DOI: 10.1140/epja/i2004-10251-1