1. Apical periodontitis: microbial infection and host responses;Ørstavik,1998
2. Sinographic examination of the maxillary sinus in cases of chronic periapical osteitis;Ericson;Odontol Tidskr,1964
3. Roentgenological investigations into the relation between periapical lesions and conditions of the mucous membrane of maxillary sinuses;Mattila;Acta Odontol Scand,1965
4. Local hyperplasia of the maxillary sinus mucosa after elimination of adjacent periapical osteitis. A follow-up study;Ericson;Odontol Revy,1966
5. The effect of conservative root canal therapy on local mucosal hyperplasia in the maxillary sinus;Nenzen;Odontol Revy,1967