Shrestha, N., P. Shrestha, M. Marhatta, and S. Acharya. “Comparison of Percutaneous Dilatational Tracheostomy With Open Tracheostomy in Intensive Care Unit”. Journal of Institute of Medicine Nepal (JIOM Nepal), Vol. 41, no. 1, Sept. 2019, pp. 1-7, http://nepmed.nhrc.gov.np/index.php/jiomn/article/view/550.