1. 1. Kurier: Bevölkerung: Westeuropa wächst, Osteuropa schrumpft. Retrieved from https://kurier.at/chronik/weltchronik/bevoelkerung-westeuropa-waechst-osteuropa-schrumpft/400054985 [in German].
2. 2. Libanova, E.M. (Ed.), Pozniak, O.V., Makarova, O.B., Sarioglo, V.G., Tkachenko, L.G. (2009). External labour migration of population. Kyiv: Ukrainian Center for Social Reforms; State Committee of Statistics of Ukraine [in Ukrainian].
3. 3. Poznyak, O.V., Hnatiuk, T.O. (2014). State Migration Policy and its Impact on the Population Structure. In Liudskyj rozvytok v Ukraini: istorychnyj vymir transformatsii derzhavnoi sotsialnoi polityky - Human development in Ukraine: the historical dimension of the transformation of state social policy (p. 92-108). Kyiv: Ptoukha Institute for Demography and Social Studies of the National Academy of Sciences of Ukraine [in Ukrainian].
4. 4. Saryoglo, V.G. (2016). 'Great data' as a source of information and tools for official statistics: potential, problems, perspectives. Statystyka Ukrainy - Statistics of Ukraine, 4, 12-19 [in Ukrainian].
5. 5. Malinovska, O. (2015). Labour migration of Ukrainian population: what to expect at the nearest future? Retrieved from http://migraciya.com.ua/news/ migrantworkers/ua-labour-migration-ukrainewhat-to-expectinthe-near-future-part-1 [in Ukrainian].