1. Lammer EJ, Chen DT, Hoar RM, Agnish ND, Benke PJ, Braun JT, et al. Retinoic Acid embryopathy. N Engl J Med 1985; 313: 837-41.
2. Teratology Society Position Paper. Vitamin A during pregnancy. Recommendations for vitamin A use during pregnancy;Teratology,1987
3. Arhinencephaly unilateralis, uveal coloboma and lens reduplication;Lyford, J.H.; Roy, F.H.,1974
4. A case of reduplicated intraocular lens;Richardson, A.;Trans Can Ophthalmol Soc,1951
5. Comparative assessment of the toxicology of vitamin A and retinoids in man;Bielsalski, H.K.;Toxicology,1989