Gupta, C., Rastogi, B., Agarwal, S., Singh, V. P., Choudhary, V. K., & Inayat, U. (2017). Clinical efficacy of Esmolol, Lignocaine and Diltiazem as premedicant for attenuation of hemodynamic responses of laryngoscopy and endotracheal intubation- a comparative evaluation. International Journal of Research in Medical Sciences, 5(10), 4443–4449. https://doi.org/10.18203/2320-6012.ijrms20174575