Shaheen, M. S. A., A. N. Chowdhury, K. Sardar, M. Rahman, S. S. Biswas, and A. Taous. “Controlled Hypotension for Functional Endoscopic Sinus Surgery: A Comparative Study of Dexmedetomidine and Esmolol”. Bangladesh Journal of Otorhinolaryngology, vol. 24, no. 1, Feb. 2020, pp. 37-49, doi:10.3329/bjo.v24i1.45340.