Ahmed Beniamen Mohamed Hussien, Zaki Taha Saleh, Hala Abdel Sadek Al attar and Yasser Mohamed Nasr (2020) “Preoperative regional scalp block versus intraoperative intravenous fentanyl for attenuating intraoperative surgical stress response to supratentorial craniotomy in adult patients under general anaesthesia”, International Journal of Research in Pharmaceutical Sciences, 11(4), pp. 6996–7004. Available at: https://ijrps.com/home/article/view/1863 (Accessed: 22 January 2025).