Hiroshi Fujisaki Discretized Markov Transformations - -An Example of Ultradiscrete Dynamical Systems - -. 2684-2691 2005 88-A IEICE Transactions 10 http://dx.doi.org/10.1093/ietfec/e88-a.10.2684 db/journals/ieicet/ieicet88a.html#Fujisaki05