I. Bielova, A. Bukhtiarova, L. Taraniuk, I. D’yakonova, и O. Pakhnenko. (2021 г.) 2021. «ENVIRONMENTAL QUALITY AS A FACTOR OF INFLUENCE ON MORTALITY FROM COVID-19». «Вестник НАН РК», вып. 3 (октябрь):19-26. http://189185.vm7pq.group/bulletin-science/article/view/2018.