Ruble, Mesbahul Karim, AKM Rafiqul Bari, Amar Biswas, Md Khairul Anam, Mahbub E Khuda, Md Amjad Hossain, and Mostofa Kamal. “Observation of the Improvement in Nocturnal Asthma Symptoms With Administration of Once Daily Sustained Released Theophylline”. Journal of Shaheed Suhrawardy Medical College 9, no. 2 (July 5, 2018): 74–77. Accessed April 20, 2024. https://www.banglajol.info/index.php/JSSMC/article/view/37267.