Takorov, I., 		Lukanova, Ts., 		Simeonovski, S., 		Vylcheva, D., 		Dimitrov, D., 		Stanimirov, Ts., 		Arnaudov, S., AND 		Abrasheva, M..
" Spontaneous Pneumomediastinum in a SARS-CoV-2 Positive Patient Treated with High-flow Nasal Cannula: A Case Report" <em>Medical Research Archives</em> [Online], Volume 10 Number 1 (29 January 2022)