Hossain, Nazia, Kamruzzaman Kamrul, Akhand Sultana, Md Shakibur Rahman, and Md Ruhul Amin. “Recurrent and Persistent Pneumonia in Dhaka Shishu (Children) Hospital: Clinical Profile and Etiology”. Bangladesh Journal of Child Health 42, no. 3 (December 17, 2018): 125-129. Accessed May 26, 2019. https://www.banglajol.info/index.php/BJCH/article/view/39261.