Syunyakova, D. A. ’Infectious Diseases Among Migrants in Countries of the Greater Mekong Subregion in the Period before the COVID-19 Pandemic’. DEMIS. Demographic Research, Vol. 1, no. 4, Nov. 2021, pp. 140-51, doi:https://doi.org/10.19181/demis.2021.1.4.11.