Haim H. Permuter Tsachy Weissman Andrea J. Goldsmith Finite State Channels With Time-Invariant Deterministic Feedback. 644-662 2009 55 IEEE Transactions on Information Theory 2 http://dx.doi.org/10.1109/TIT.2008.2009849 db/journals/tit/tit55.html#PermuterWG09