Arikawa K (tháng 11 năm 2003). “Spectral organization of the eye of a butterfly, Papilio”. J. Comp. Physiol. A. 189 (11): 791–800. doi:10.1007/s00359-003-0454-7. PMID14520495.
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Cronin TW, Marshall NJ (1989). “A retina with at least ten spectral types of photoreceptors in a mantis shrimp”. Nature. 339 (6220): 137–40. Bibcode:1989Natur.339..137C. doi:10.1038/339137a0.
Arikawa K (tháng 11 năm 2003). “Spectral organization of the eye of a butterfly, Papilio”. J. Comp. Physiol. A. 189 (11): 791–800. doi:10.1007/s00359-003-0454-7. PMID14520495.
