1. Ajiki M., Takamura K., Hiramatsu K., Nakai M., Sasaki N., Konishi S., Isolation and characterization of parainfluenza 5 virus from a dog, Nippon Juigaku Zasshi (1982) 44:607–618.
2. Appel M., Percy D.H., SV5-like parainfluenza virus in dogs, J. Am. Vet. Med. Assoc. (1970) 156:1778–1781.
3. Appel M., Bistner S.I., Menegus M., Albert D.A., Carmichael L.E., Pathogenicity of low-virulence strains of two canine adenoviruses, Am. J. Vet. Res. (1973) 34:543–550.
4. Appel M., Reovirus, in: Appel M.J. (Ed.), Virus infections of carnivores, Elsevier Science Publisher, Amsterdam, 1987, pp. 95–96.
5. Appel M., Canine adenovirus type 2 (Infectious Laryngotracheitis Virus), in: Appel M.J. (Ed.), Virus Infections of Carnivores, Elsevier Science Publisher, Amsterdam, 1987, pp. 45–51.