Non-ideal Particle Distributions from Kinetic Freeze Out Models
  In fluid dynamical models the freeze out of particles across a three dimensional space-time hypersurface is discussed. The calculation of final momentum distribution of emitted particles is described for freeze out surfaces, with both space-like and time-like normals, taking into account conservation laws across the freeze out discontinuity. 
Cs. Anderlik, Zs.I. L\'az\'ar, V.K. Magas, L.P. Csernai, H. St\"ocker   and W. Greiner