@article{10_37236_9264,
     author = {Jaros{\l}aw Grytczuk and Hubert Kordulewski and Artur Niewiadomski},
     title = {Extremal square-free words},
     journal = {The electronic journal of combinatorics},
     year = {2020},
     volume = {27},
     number = {1},
     doi = {10.37236/9264},
     zbl = {1435.05007},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/9264/}
}