Kumar, A., Mishra, P.K. and Shukla, S. 2017. A randomized, controlled study to compare the effects of intravenous labetalol and esmolol on haemodynamic changes during laryngoscopy and intubation. International Journal of Research in Medical Sciences. 5, 9 (Aug. 2017), 4003–4007. DOI:https://doi.org/10.18203/2320-6012.ijrms20173971.