Muhammad Chanchal Azad, Kristin Fraser, Nahid Rumana, Ahmad Faris Abdullah, Nahid Shahana, Patrick J. Hanly, Tanvir Chowdhury Turin,
Sleep Disturbances among Medical Students: A Global Perspective Journal of Clinical Sleep Medicine. ,vol. 11, pp. 69- 74 ,(2015) ,
10.5664/JCSM.4370