Jonathan Eckstein, Nonlinear Proximal Point Algorithms Using Bregman Functions, with Applications to Convex Programming, Mathematics of Operations Research, Vol. 18, No. 1 (Feb., 1993), pp. 202-226 ...

Use is made of the fact that the rate $\psi^\ast$ is nothing more than the conjugate convex function of $\psi$. Results concerning the relationship of the behavior of the difference of convex ...