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Borodin, O. V., Broersma, H. J., Glebov, A. and van den Heuvel, Jan 
ORCID: 0000-0003-0897-9148
(2004)
A new upper bound on the cyclic chromatic number.
CDAM research report series (LSE-CDAM-2004-04).
Centre for Discrete and Applicable Mathematics, London School of Economics and Political Science, London, UK.
