Simple solutions of fireball hydrodynamics for self-similar elliptic   flows
  Simple, self-similar, elliptic solutions of non-relativistic fireball hydrodynamics are presented, generalizing earlier results for spherically symmetric fireballs with Hubble flows and homogeneous temperature profiles. The transition from one dimensional to three dimensional expansions is investigated in an efficient manner. 
S. V. Akkelin, T. Csorgo, B. Lukacs, Yu. M. Sinyukov and M. Weiner