no. 1
Substitution invariant cutting sequences
Journal de Théorie des Nombres de Bordeaux, Tome 5 (1993) no. 1, pp. 123-137. 
@article{JTNB_1993__5_1_123_0,
     author = {Crisp, D. and Moran, W. and Pollington, A. D. and Shiue, P.},
     title = {Substitution invariant cutting sequences},
     journal = {Journal de Th\'eorie des Nombres de Bordeaux},
     pages = {123--137},
     publisher = {Universit\'e Bordeaux I},
     volume = {5},
     number = {1},
     year = {1993},
     zbl = {0786.11041},
     mrnumber = {1251232},
     language = {en},
     url = {http://archive.numdam.org/item/JTNB_1993__5_1_123_0/}
}
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Crisp, D.; Moran, W.; Pollington, A.; Shiue, P. Substitution invariant cutting sequences. Journal de Théorie des Nombres de Bordeaux, Tome 5 (1993) no. 1, pp. 123-137. http://archive.numdam.org/item/JTNB_1993__5_1_123_0/

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