Imesch PD, Wallow IH, Albert DM (February 1997). „The color of the human eye: a review of morphologic correlates and of some conditions that affect iridial pigmentation”. Surv Ophthalmol.41 (Suppl 2): S117–23. DOI:10.1016/S0039-6257(97)80018-5. PMID9154287.
Prota G, Hu DN, Vincensi MR, McCormick SA, Napolitano A (September 1998). „Characterization of melanins in human irides and cultured uveal melanocytes from eyes of different colors”. Exp Eye Res.67 (3): 293–9. DOI:10.1006/exer.1998.0518. PMID9778410.
Imesch PD, Wallow IH, Albert DM (February 1997). „The color of the human eye: a review of morphologic correlates and of some conditions that affect iridial pigmentation”. Surv Ophthalmol.41 (Suppl 2): S117–23. DOI:10.1016/S0039-6257(97)80018-5. PMID9154287.
Prota G, Hu DN, Vincensi MR, McCormick SA, Napolitano A (September 1998). „Characterization of melanins in human irides and cultured uveal melanocytes from eyes of different colors”. Exp Eye Res.67 (3): 293–9. DOI:10.1006/exer.1998.0518. PMID9778410.