@article{10_37236_1767,
     author = {Christoph Richard and Uwe Grimm},
     title = {On the entropy and letter frequencies of ternary square-free words},
     journal = {The electronic journal of combinatorics},
     year = {2004},
     volume = {11},
     number = {1},
     doi = {10.37236/1767},
     zbl = {1104.68090},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1767/}
}