@article{JTNB_2001__13_2_421_0,
     author = {Heinis, Alex},
     title = {On low-complexity bi-infinite words and their factors},
     journal = {Journal de th\'eorie des nombres de Bordeaux},
     pages = {421--442},
     publisher = {Universit\'e Bordeaux I},
     volume = {13},
     number = {2},
     year = {2001},
     mrnumber = {1879667},
     zbl = {1013.68155},
     language = {en},
     url = {http://www.numdam.org/item/JTNB_2001__13_2_421_0/}
}