1. V. Saranathan, A.E. Seago, S. Narayanan, A. Sandy, S.G.J. Mochrie, E.R. Dufresne, H. Cao, C.O. Osuji, R.O. Prum, Nano Lett. 15, 3735–3742 (2015)
2. D.L. Fox, Animal Biochromes and Structural Colors (Univ. California Press, Berkeley, CA, 1976)
3. E. Hecht, Optics, 2nd edn. (Addison-Wesley Publishing, Reading, MA, 1987)
4. H.M. Fox, G. Vevers, The Nature of Animal Colors (Macmillan, New York, 1960)
5. R.O. Prum, in Bird Coloration: Mechanisms, vol. I: Mechanisms and Measurements (Harvard University Press, Boston, 2006)