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Chatterjee, Krishnendu. Probabilistic Automata on Infinite Words: Decidability and Undecidability Results. IST Austria, 2009, doi:10.15479/AT:IST-2009-0004.

Chatterjee, Krishnendu, et al. Qualitative Analysis of Partially-Observable Markov Decision Processes. IST Austria, 2009, doi:10.15479/AT:IST-2009-0001.