@article{10_1090_S0894_0347_1992_1130528_4,
     author = {Kim, K. H. and Roush, F. W.},
     title = {Williams\^a€™s conjecture is false for reducible subshifts},
     journal = {Journal of the American Mathematical Society},
     pages = {213--215},
     publisher = {mathdoc},
     volume = {05},
     number = {1},
     year = {1992},
     doi = {10.1090/S0894-0347-1992-1130528-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1992-1130528-4/}
}