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3. A. Bensoussan; M. Robin, On the Convergence of the Discrete Time Dynamic Programming Equation for General Semi groups, SIAM Control, to be published.
4. M.H.A. Davis; M. Kohlmann, On the Non linear Semi-group of Stochastic Control under Partial Observations, submitted to SIAM Control.
5. W.H. Fleming, Non linear Semi group for Controlled Partially Observed Diffusions, preprint.