Reference 3
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[3]
Luis Cereceda, Jan van den Heuvel and Matthew Johnson,
Connectedness of the graph of vertex-colourings,
Discrete Mathematics 308(5-6), pp. 913-919, 2008. (LINK)
Connectedness of the graph of vertex-colourings,
Discrete Mathematics 308(5-6), pp. 913-919, 2008. (LINK)