1. Pathogenesis of canine distemper;Appel;Am. J. Vet. Res.,1969
2. Distemper pathogenesis in dogs;Appel;J. Am. Vet. Med. Assoc.,1970
3. Canine distemper virus;Appel;Virol. Monogr.,1972
4. Morbillivirus diseases of animals;Appel,1981
5. Single serum sample diagnosis of canine viral infections;Black;Vet. Med. Small. Anim. Clin.,1983