Momand, H., and O. Bobokhojaev. “Sensitivity of Doppler Echocardiography and Right Heart Catheterization in Evaluation of Pulmonary Artery Pressure in COPD Patients”. Integrated Journal for Research in Arts and Humanities, vol. 6, no. 2, Apr. 2026, pp. 206-11, doi:10.55544/ijrah.6.2.34.