RETROSPECTIVE ANALYSIS OF CHRONIC RHEUMATIC CARDIAC DISEASES AND ITS COMPLICATIONS IN THE SOUTH KAZAKHSTAN REGION. World Science, [S. l.], v. 2, n. 1(5), p. 38–41, 2016. Disponível em: https://rspublisher.org/index.php/ws/article/view/574. Acesso em: 17 mar. 2026.