Білошицький, П., Ключко, О. and Онопчук, Ю. 2022. Results of research of hypoxia problems by Ukrainian scientists in Elbrus region. Proceedings of National Aviation University. 33, 3-4 (Jun. 2022), 44–50. DOI:https://doi.org/10.18372/2306-1472.33.1496.