Weyl-Titchmarsh Theory for CMV Operators Associated with Orthogonal   Polynomials on the Unit Circle
  We provide a detailed treatment of Weyl-Titchmarsh theory for half-lattice and full-lattice Cantero-Moral-Velazquez (CMV) operators and discuss their systems of orthonormal Laurent polynomials on the unit circle, spectral functions, variants of Weyl--Titchmarsh functions, and Green's functions. In particular, we discuss the corresponding spectral representations of half-lattice and full-lattice CMV operators. 
Fritz Gesztesy and Maxim Zinchenko