Jacobson, Aleman, Cideciyan et al.: "Human cone photoreceptor dependence on RPE65 isomerase." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 104, Issue 38, pp. 15123-8, 2007 (PubMed).
Moiseyev, Takahashi, Chen et al.: "RPE65 from cone-dominant chicken is a more efficient isomerohydrolase compared with that from rod-dominant species." in: The Journal of biological chemistry, Vol. 283, Issue 13, pp. 8110-7, 2008 (PubMed).