@article{10_37236_1587,
     author = {Jeffrey Shallit and Ming-wei Wang},
     title = {Weakly self-avoiding words and a construction of {Friedman}},
     journal = {The electronic journal of combinatorics},
     year = {2001},
     volume = {8},
     number = {1},
     doi = {10.37236/1587},
     zbl = {0966.68164},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1587/}
}