Cherneva, Zheina, Dinko Valev, Vania Youroukova, and Radostina Cherneva. 2020. “Stress Induced Right Ventricular Diastolic Dysfunction in Non-Severe Chronic Obstructive Pulmonary Disease - the Role of Oxidative Stress and Inflammation”. Cardiology and Cardiovascular Medicine 4 (4):460-80. http://www.fortunejournals.org/ojs/index.php/ccm/article/view/15909.