Santosh Kumar Nayan, Siddharth Singh, Janardan, and Sumeet Kumar. “Role of Blood Urea Nitrogen (BUN)/ Serum Creatinine Ratio and Urine Specific Gravity for Early Neurological Deterioration in Patients With Acute Ischaemic Stroke”. International Journal of Health and Clinical Research, vol. 5, no. 1, Jan. 2022, pp. 370-2, https://ijhcr.com/index.php/ijhcr/article/view/4166.