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References

  • Endler, J.A. (1990) On the measurement and classification of colour in studies of animal colour patterns. Biological Journal of the Linnean Society 41, 315352.
  • Montgomerie, R. (2006) Analyzing colors. Bird Coloration. Vol. I. Mechanisms and Measurements (eds G.E.Hill & K.J. McGraw), Table 3.2, p. 108. Harvard University Press, Cambridge, MA.