Begum, M, et al. “A Comparative Study Between Efficacy Of Esmolol And Lignocaine For Attenuating Haemodynamics Response Due To Laryngoscopy And Endotracheal Intubation”. Faridpur Medical College Journal, vol. 5, no. 1, Jan. 2011, pp. 25-28, doi:10.3329/fmcj.v5i1.6810.