HinaSiddiqi, TahrimAnsar, SamirFasih. “Variations in Cerebral Arterial Circle of Willis in Patients With Hemorrhagic Stroke: A Computed Tomography Angiographic Study”. Journal of Rawalpindi Medical College 17, no. 2 (December 30, 2013). Accessed November 2, 2025. https://journalrmc.com/index.php/JRMC/article/view/455.