Ahmed, Muhanad A. “Attenuation of the Cardiovascular Response During Rigid Bronchoscope a Comparative Study Using Intravenous Lidocaine and Sublingual Glyceryl Trinitrate”. Journal of the Faculty of Medicine Baghdad, vol. 53, no. 2, July 2011, pp. 115-20, https://doi.org/10.32007/jfacmedbagdad.532848.