Jończy, R., and D. Rokita-Poskart. “Fiscal Effects of Migration As a Factor Increasing Disparities in Local and Regional Development – an Example of the Opole Voivodeship in Poland”. Economic and Environmental Studies, vol. 13, no. 1 (25), Dec. 2020, pp. 9-22, https://czasopisma.uni.opole.pl/index.php/ees/article/view/2998.