1. Electroretinography of congenital night blindness in an Appaloosa filly;Witzel;Journal of Equine Medicine and Surgery,1977
2. Night blindness in the Appaloosa: sibling occurrence;Witzel;Journal of Equine Medicine and Surgery,1977
3. Congenital stationary night blindness: an animal model;Witzel;Investigative Ophthalmology and Visual Science,1978
4. Clinical manifestations of night blindness in the Appaloosa horse;Rebhun;Compendium of Continuing Education and the Practicing Veterinarian,1984
5. Clinical and electroretinographic characteristics of congenital stationary night blindness and the association with the leopard complex in the Appaloosa horse;Sandmeyer;Veterinary Ophthalmology,2007