@incollection{Varshney13,
author = {Rickul Varshney and Faisal Zawawi and Marc A Tewfik and Saul Frenkiel},
title = {Endoscopy - An Advancement in Sinus and Skull Base Surgery},
booktitle = {Endoscopy},
publisher = {IntechOpen},
address = {Rijeka},
year = {2013},
editor = {Somchai Amornyotin},
chapter = {8},
doi = {10.5772/52749},
url = {https://doi.org/10.5772/52749}
}