Saodat Yarmukhamedova, et al. “Studying Signs of Diastolic Dysfunction of the Right Ventricle in Patients With Hypertonic Disease”. Global Journal of Medical Research, vol. 20, no. F9, Aug. 2020, pp. 7-12, https://medicalresearchjournal.org/index.php/GJMR/article/view/2233.