1. Cohen, B.M.: Methodology for clinical trials of drugs affecting the nasal airways. Med. Res. Engineering8, 22?26 (1969).
2. Cohen, B.M., Duffy, E.P.: Physiologic and clinical estimates of the relief of nasal flow obstruction in allergic rhinitis: Effects of a topical decongestant (oxymetazoline). J. Asth. Res.7, 65?73 (1969).
3. Knowelden, J.: A trial of antihistamine drugs in the treatment of the common cold. In controlled clinical trials, pp. 31?37. Blackwell Scientific Publications. Oxford 1960.
4. Ogura, J.H.: Experimental observations of the relationships between upper airway obstruction and pulmonary function. Ann. Otol.73, 381?403 (1964).
5. Solomon, W.R., Stohrer, A.W.: Considerations in the measurement of nasal patency. Ibid.74, 978?990 (1965).