Aldo de Luca. On some combinatorial problems in free monoids. Discrete Mathematics, 38(2-3):207-225, 1982. [doi]
@article{Luca82,
title = {On some combinatorial problems in free monoids},
author = {Aldo de Luca},
year = {1982},
doi = {10.1016/0012-365X(82)90290-4},
url = {http://dx.doi.org/10.1016/0012-365X(82)90290-4},
researchr = {https://researchr.org/publication/Luca82},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {38},
number = {2-3},
pages = {207-225},
}