1. Controlled hypotension in children: A critical review of available agents;Tobias;Paediatr Drugs,2002
2. 2. Ankit Patel, MD; Chief Editor: Arlen D Meyers, MD, MBA; Functional endoscopic sinus surgery overview Updated December 14, 2014.
3. 3. Messerklinger W. Endoscopy of the Nose. Baltimore-Munich 1978: Urban and Schwarzenberg 1978:1-54.
4. Endoscopic endonasal surgery-concepts in treatment of recurring rhinosinusitis;Stammberger;Otolaryngol Head Neck Surg,1986
5. 5. Stammberger H. Functional Endoscopic Sinus Surgery. Philadelphia: BC Decker 1991;321-33.