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[2]Aihua Fan, Lingmin Liao ,Yuefei Wang and Danzhou, C.R. Math. Acad. Sci. Paris, 344(2007) no.4. 219-224. 2. $p$-adic repelers in $\mathbb{Q}_p$ are subshift of finite type.
[3]Aihua Fan, Mingtian Li ,Jiayan Yao and Danzhou, Adv. Math, 214(2007) no.2. 666-700.3. Strict ergodicity of affine $p$-adic dynamical systems on $\mathbb{Z}_p$."