Lakshmi Narasimha Rao K., Padmaja Reddy K., Sudheer Babu K., Soloman Raju K., Visweswara Rao K., and Jafer Vali Shaik, “Simultaneous Estimation of Fluticasone propionate, Azelastine Hydrochloride, Phenylethyl alcohol and Benzalkonium chloride by RP-HPLC Method in Nasal spray preparations”, Int. J. Res. Pharm. Sci., vol. 1, no. 4, pp. 473–480, Nov. 2010.