@article{ERAAMS_1999_05_a12,
     author = {Marcus, Brian and Tuncel, Selim},
     title = {Powers of positive polynomials and codings of {Markov} chains onto {Bernoulli} shifts},
     journal = {Electronic research announcements of the American Mathematical Society},
     pages = {91--101},
     publisher = {mathdoc},
     volume = {05},
     year = {1999},
     doi = {10.1090/S1079-6762-99-00066-9},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-99-00066-9/}
}