@article{10_37236_3758,
     author = {S\'ebastien Labb\'e},
     title = {A counterexample to a question of {Hof,} {Knill} and {Simon}},
     journal = {The electronic journal of combinatorics},
     year = {2014},
     volume = {21},
     number = {3},
     doi = {10.37236/3758},
     zbl = {1299.68045},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3758/}
}