Hoque, Md Harisul, SM Mustafa Zaman, Khurshid Ahmed, Sajal Krisna Banerjee, Md Faisal Ibne Kabir, and Nilufar Fatema. “Hepatic Venous Duplex As an Alternative Non- Invasive Diagnostic Tool for Diagnosis of Pulmonary Hypertension”. University Heart Journal 16, no. 2 (October 11, 2020): 86–91. Accessed October 1, 2022. https://www.banglajol.info/index.php/UHJ/article/view/49665.