Parveen, Rumana, Md Mahbubul Hoque, and Probir Kumar Sarkar. “Underlying Diseases Associated With Persistent Pneumonia in Children Aged 2 Months to 5 Years”. Journal of Bangladesh College of Physicians and Surgeons 42, no. 2 (April 30, 2024): 114–119. Accessed November 21, 2024. https://banglajol.info/index.php/JBCPS/article/view/72392.