Bokan, Dalibor, and Zoran Fiser. “Guidelines 2021 - The System Saving Lives”. Journal Resuscitatio Balcanica 7, no. 18 (August 29, 2021): 304 -309. Accessed December 7, 2025. https://www.aseestant.ceon.rs/index.php/jrb/article/view/32739.