Equivalence of the Markov chains and two-sided symbolic sequences S. S. Apostolov, Z. A. Mayzelis, O. V. Usatenko and V. A. Yampol'skii Europhys. Lett., 76 6 (2006) 1015-1021 Published online: 29 November 2006 DOI: 10.1209/epl/i2006-10410-4