Chakarov, I. “A Case Study of a Child With Down Syndrome: A Dilemma for the Accompanying Pulmonary Impairment”. Acta Medica Bulgarica 52, no. 4 (December 10, 2025): 72–78. Accessed December 16, 2025. https://journals.mu-sofia.bg/index.php/amb/article/view/536.