Local existence and continuation criteria for solutions of the   Einstein-Vlasov-scalar field system with surface symmetry
  We prove in the cases of spherical, plane and hyperbolic symmetry a local in time existence theorem and continuation criteria for cosmological solutions of the Einstein-Vlasov-scalar field system, with the sources generated by a distribution function and a scalar field, subject to the Vlasov and wave equations respectively. This system describes the evolution of self-gravitating collisionless matter and scalar waves within the context of general relativity. In the case where the only source is a scalar field it is shown that a global existence result can be deduced from the general theorem. 
David Tegankong, Norbert Noutchegueme and Alan D. Rendall