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 throughout life". Survey of Ophthalmology. 41 (Suppl 2): S117–23. doi:10.1016/S0039-6257(97)80018-5. PMID9154287.
Konovalova EN, Gladyr EA, Kostiunina OV, Zinovieva LK (2017). "Congenital Defects of Beef Cattle and General Principles of their Prevention". Journal of Agriculture and Environment. 2 (3). doi:10.23649/jae.2017.2.3.1.Pemeliharaan CS1: Banyak nama: authors list (link)
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 throughout life". Survey of Ophthalmology. 41 (Suppl 2): S117–23. doi:10.1016/S0039-6257(97)80018-5. PMID9154287.