Dominique Perrin, Christophe Reutenauer. Hall sets, Lazard sets and comma-free codes. Discrete Mathematics, 341(1):232-243, 2018. [doi]
@article{PerrinR18,
title = {Hall sets, Lazard sets and comma-free codes},
author = {Dominique Perrin and Christophe Reutenauer},
year = {2018},
doi = {10.1016/j.disc.2017.08.034},
url = {https://doi.org/10.1016/j.disc.2017.08.034},
researchr = {https://researchr.org/publication/PerrinR18},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {341},
number = {1},
pages = {232-243},
}