Jawad Ahmad, Najaf Abbas, Mazhar Iftikhar, Shahbaz Mujtabaghauri, Mohammad Qamar Nasir, “Efficacy of Antihistamine Nasal Spray Compared with Oral Antihistamine in Treatment of Allergic Rhinitis”, Pakistan Journal of Medical & Health Sciences, vol. 17, no. 04, p. 539, Jun. 2023.