@article{10_37236_5616,
     author = {Henk Don},
     title = {The {\v{C}ern\'y} conjecture and 1-contracting automata},
     journal = {The electronic journal of combinatorics},
     year = {2016},
     volume = {23},
     number = {3},
     doi = {10.37236/5616},
     zbl = {1350.68167},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/5616/}
}