Alam, Shahjehan, Rayyan Pervez, and Salman Rafique. 2013. “VALIDITY OF COLOR DOPPLER SONOGRAPHY IN EVALUATION OF MALIGNANT PORTAL VEIN THROMBOSIS IN HEPATOCELLULAR CARCINOMA”. Journal of Postgraduate Medical Institute 27 (2). https://www.jpmi.org.pk/index.php/jpmi/article/view/1392.