@article{JTNB_2020__32_2_585_0,
     author = {Bell, Jason P.},
     title = {The upper density of an automatic set is rational},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {585--604},
     publisher = {Soci\'et\'e Arithm\'etique de Bordeaux},
     volume = {32},
     number = {2},
     year = {2020},
     doi = {10.5802/jtnb.1135},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/jtnb.1135/}
}