Thermodynamics of the two-dimensional black hole in the   Teitelboim-Jackiw theory
  The two-dimensional theory of Teitelboim and Jackiw has constant and negative curvature. In spite of this, the theory admits a black hole solution with no singularities. In this work we study the thermodynamics of this black hole using York's formalism. 
Jose' P. S. Lemos (Observatorio Nacional, Rio de Janeiro)