Skin Blood Perfusion and Oxygenation Colour Affect Perceived Human Health Stephen, Ian D. ; Coetzee, Vinet ; Law Smith, Miriam ; Perrett, David I. Abstract Publication: PLoS ONE Pub Date: April 2009 DOI: 10.1371/journal.pone.0005083 Bibcode: 2009PLoSO...4.5083S