Pytel, Sławomir Piotr, and Iwona Kiniorska. “The Socioeconomic Status of Polish Pensioners Before and After Migration”. Acta Universitatis Lodziensis. Folia Oeconomica 5, no. 344 (September 30, 2019): 67–84. Accessed April 20, 2024. https://czasopisma.uni.lodz.pl/foe/article/view/3858.