Azad, A. K., M. Haque, and A. Islam. “Anesthesia With Mask Free Sleep Inducing Balloon in Pediatric Patients; A Tertiary Care Hospital Experience”. Journal of Bangladesh College of Physicians and Surgeons, vol. 39, no. 1, Nov. 2020, pp. 19-23, doi:10.3329/jbcps.v39i1.50449.