Zulkarnine, M., Choudhury, B., Islam, M., & Ahmed, N. (2011). Congenital Absence of Pericardium: A Rare Case Associated with Severe Mitral Stenosis with Pulmonary Hypertension. Cardiovascular Journal, 3(2), 222–225. https://doi.org/10.3329/cardio.v3i2.9193