Kanalev, K., Stoykov, K. and Angelova, P. (2025) “LABORATORY INDICES OF THE CAPACITY OF THE BLOOD TO TRANSPORT OXYGEN AT NORMAL AND HIGH ALTITUDE IN ATHLETES AND PEOPLE WITH HIGH LEVEL PHYSICAL ACTIVITY”, KNOWLEDGE - International Journal , 69(4), pp. 783–787. Available at: https://ojs.ikm.mk/index.php/kij/article/view/7299 (Accessed: 28 July 2026).