4Renato Roithmann MD, Philip Cole MD, Jerry Chapnik MD, et al. Acoustic rhinometry in the evaluation of nasal obstruction [J]. Laryngoscope, 1995,105:275-281.
5Haight J S J, Cole P. The site and function of the nasal valve[J]. Laryngoscope, 1983, 93:49 - 50 .
6Roger W. Fox MD,Richard F. Lockey MD. The impact of rhinosinusitis on asthma[J] 2003,Current Allergy and Asthma Reports(6):513~518