Interacting Spinor and Scalar Fields in Bianchi type-I Universe filled   with Perfect Fluid: Exact Self-consistent Solutions
  Self-consistent solutions to interacting spinor and scalar field equations in General Relativity are studied for the case of Bianchi type-I space-time filled with perfect fluid. The initial and the asymptotic behavior of the field functions and the metric one has been thoroughly studied. 
B. Saha and G. N. Shikin