1. The convergence problem for differential games;Fleming;J. Math. Anal. Appl.,1961
2. Semigroups of conditional shifts and approximation of Markov processes;Kurtz;Ann. Prob.,1975
3. Approximation and Weak Convergence Methods for Random Processes, with Applications to Stochastic System Theory;Kushner,1984
4. Numerical Methods for Stochastic Control Problems in Continuous Time;Kushner,1992
5. Optimal and approximately optimal control policies for queues in heavy traffic;Kushner;SIAM J. Control Optim.,1989