Shanmugaiah, Anand, et al. “The Efficacy of Intracisternal Irrigation of Papaverine on Cerebral Blood Flow in Patients With Subarachnoid Hemorrhage”. Nepal Journal of Neuroscience, vol. 20, no. 2, July 2023, pp. 13-16, doi:10.3126/njn.v20i2.52310.