P. Koirala, R. H. Ghimire, D. R. Mishra, B. Bista, and B. Shah, “Utility of Epworth Sleepiness Scale (ESS) in predicting the presence of Sleep Related Breathing Disorders (SRBD) in patients in Routine Respiratory Clinical Service”, J Nobel Med Coll, vol. 6, no. 2, pp. 9–13, Apr. 2018.