[1]Berger T, Ye Z. Entropic aspects of random fields on trees. IEEE Trans on Information Theory, 1990,36(5): 1006-1018

[2]Liu W. Relative entropy densities and a class of limit theorems of the sequence of m-valued random variables. Ann Probab, 1990, 18: 829-839

[3]Liu W, Yang W G. An extension of Shannon-McMillan theorem and some limit properties for nonhomo-geneous Markov chains. Stochastic Processes Appl, 1996, 61: 129-146

[4]Spitzer F. Markov random fields on an infinite tree. Ann Prabab, 1975,3:387-398

[5]Ye Z, Berger T. Ergodic, regularity and asymptotic equipartition property of random fields on trees. J of Combinatorics, Information & System Sciences, 1996,21(2):157-184