Nasution, I. K., N. D. A. Lubis, I. Erwin, and M. I. Nusa. “Cognitive Function Differences Based on Hemispheric Lesions of First-Ever Ischemic Stroke Patients”. International Journal of Medical Science and Clinical Invention, vol. 5, no. 3, Mar. 2018, pp. 3616-8, doi:10.18535/ijmsci/v5i3.11.