1. Anonymous: Coloboma and cattle licensing;Vet. Rec.,1974
2. Literaturbericht zu Struktur, Entwicklung und Anomalien des zentralen optischen Systems;Arndt;Dtsch. Tierärztl. Wochenschr.,1978
3. Congenital nuclear cataracts in cattle;Ashton;Vet. Rec.,1977
4. Hereditary internal hydrocephalus of Horned Hereford cattle;Axthelm;AA VLD.,1980
5. Congenital internal hydrocephalus in Polled Hereford cattle;Axthelm;Vet. Med. Small Anim. Clin.,1981