C. Kiki Krevani, M. Z. Azzuhdi, F. H. Soegistiono, and P. Maulina, “The Effectiveness of a 4-Week Physical Exercise Program in Patients with Pulmonary Arterial Hypertension: A Pilot Study in Sumatra”, Front. Healthc. Res., vol. 1, no. 1, pp. 46–54, Jan. 2024, doi: 10.63918/fhr.v1.n1.p46-54.2024.