1. Functional endoscopic sinus surgery: concepts, indications and results of the Messerklinger technique;Stammberger;Eur Arch Otorrhinolaryngol,1990
2. Endoscopy of the nose;Messerklinger,1978
3. Functional endoscopic sinus surgery;Stammberger,1991
4. Prognostic factors, outcomes and staging in ethmoid sinus surgery;Kennedy;Laryngoscope,1992
5. Acoustic rhinometry: evaluation of nasal cavity geometry by acoustic reflections;Hilberg;J Appl Physiol,1989