Hossain, Md Alamgir, et al. “Digital Subtraction Angiographic Pattern of Extracranial and Intracranial Atherosclerotic Arterial Stenosis Among Ischemic Stroke Patients”. Bangladesh Journal of Neuroscience, vol. 33, no. 2, July 2017, pp. 89-95, doi:10.3329/bjn.v33i2.57523.