Basworo, Adityo, and Agus Subagjo. “Cardio-Vocal Syndrome As a Complication Patient With Severe Mitral Regurgitation and Moderate Aortic Regurgitation With Pulmonary Hypertension”. Qanun Medika - Medical Journal Faculty of Medicine Muhammadiyah Surabaya 5, no. 1 (January 26, 2021): 145–151. Accessed May 7, 2024. https://journal.um-surabaya.ac.id/qanunmedika/article/view/4775.