Xiao Y, Kavanau C, Bertin L. The biological basis of a universal constraint on color naming: cone contrasts and the two-way categorization of colors. PloS ONE 2011;6:e24994
 Baronchelli A, Loreto V, Puglisi A. Cognitive biases and language universals. Preprint arXiv:1310.7782 (2013).
The information is available from the following content providers: