Figure data, uncorrected absorbance curve fits, from Hart, NS; Partridge, JC; Bennett, ATD; Cuthill, IC (2000). "Visual pigments, cone oil droplets and ocular media in four species of estrildid finch". Journal of Comparative Physiology A. 186 (7–8): 681–694. doi:10.1007/s003590000121. PMID11016784. S2CID19458550.
Cuthill, Innes C.; Partridge, Julian C.; Bennett, Andrew T. D.; Church, Stuart C.; Hart, Nathan S.; Hunt, Sarah (2000). Slater, Peter J.B.; Rosenblatt, Jay S.; Snowdon, Charles T.; Roper, Timothy J. (eds.). Ultraviolet Vision in Birds. Advances in the Study of Behavior. Vol. 29. Academic Press. p. 159. doi:10.1016/S0065-3454(08)60105-9. ISBN978-0-12-004529-7.
Figure data, uncorrected absorbance curve fits, from Hart, NS; Partridge, JC; Bennett, ATD; Cuthill, IC (2000). "Visual pigments, cone oil droplets and ocular media in four species of estrildid finch". Journal of Comparative Physiology A. 186 (7–8): 681–694. doi:10.1007/s003590000121. PMID11016784. S2CID19458550.
Figure data, uncorrected absorbance curve fits, from Hart, NS; Partridge, JC; Bennett, ATD; Cuthill, IC (2000). "Visual pigments, cone oil droplets and ocular media in four species of estrildid finch". Journal of Comparative Physiology A. 186 (7–8): 681–694. doi:10.1007/s003590000121. PMID11016784. S2CID19458550.