WASET
    Fahad Alsharari and  Mohd Salmi Md Noorani,  An Alternative Proof for the Topological Entropy of the Motzkin Shift.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2015, vol. 98(2). 90 - 93
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10000537.