@article{10_4171_ggd_626,
     author = {Dominik Francoeur and Ivan Mitrofanov},
     title = {On the existence of free subsemigroups in reversible automata semigroups},
     journal = {Groups, geometry, and dynamics},
     pages = {1103--1132},
     year = {2021},
     volume = {15},
     number = {3},
     doi = {10.4171/ggd/626},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/ggd/626/}
}