The Evolution of the Multicoloured Face of Mandrills: Insights from the Perceptual Space of Colour Vision Renoult, Julien P. ; Schaefer, H. Martin ; Sallé, Bettina ; Charpentier, Marie J. E. Abstract Publication: PLoS ONE Pub Date: December 2011 DOI: 10.1371/journal.pone.0029117 Bibcode: 2011PLoSO...629117R