"Spherical" 3-State Potts Spin Glass: Exact Solution
  A continuous 3-state Potts model with an analog of spherical constraints is proposed and is shown to have an exact solution in the case of infinite-ranged interactions. "Spherical" 3-state Potts spin glass model is solved using the known properties of a large random matrix. For this model the results are identical to those obtained by the replica approach for replica symmetric solution. 
N. V. Gribova, V.N.Ryzhov, and E.E.Tareyeva