o’g’li, Jamoldinov Diyorbek Maxmudjon. 2022. “Results of Surgical Treatment of Acquired Heart Defects in Elderly Patients: Risk Factors, Prognosis”. International Journal of Discoveries and Innovations in Applied Sciences 2 (8):21-25. https://openaccessjournals.eu/index.php/ijdias/article/view/1555.