1. Oral and maxillofacial surgery;Archer,1975
2. Practical oral surgery;Clark,1965
3. Closure of antroalveolar fistulae;Eneroth;Acta Otolaryngol.,1961
4. Oro-antral fistulae;Harrison;Brit. J. Clin. Pract.,1961
5. Possible sequelae when a tooth or root is dislodged into the maxillary sinus;Killey;Brit. Dent. J.,1964