Zuberi, A., V. Tiwary, B. Rastogi, K. Gupta, A. Kumar, and R. Farooqui. “Comparison of Hemodynamic Responses of Intravenous Dexmedetomidine and Esmolol Infusion During Laparoscopic Cholecystectomy”. International Journal of Research in Medical Sciences, vol. 6, no. 4, Mar. 2018, pp. 1429-34, doi:10.18203/2320-6012.ijrms20181309.