Canonical theory of the Kantowski-Sachs cosmological models
  We briefly discuss the Hamiltonian formalism of Kantowski-Sachs space-times with vacuum, anisotropic fluid and two cross-streaming radiation field sources. For these models a cosmological time is introduced. New constraints are found in which the fluid momenta are separated from the rest of the variables. In consequence their Poisson brackets give an Abelian algebra. 
Zsolt Horv\'ath, Zolt\'an Kov\'acs