1. Conventional sinus radiography compared with CT in the diagnosis of acute sinusitis;Aalokken;Dentomaxillofac Radiol,2003
2. Kehlsackentzündung beim Orang-Utan: 1. Fallbericht, chirurgische Versorgung und Therapie;Bach;Tierärztl Umsch,1986
3. Maxillary and ethmoid sinusitis with orbital and intracranial extension in an infant orangutan (Pongo pygmaeus);Cambre;J Zoo Wildl Med,1995
4. Fatal airsacculitis and pneumonia, with abortion, in an orangutan;Cambre;J Am Vet Med Assoc,1980