The project Sprawy Narodowościowe. Seria nowa 55 financed from the funds of the Ministry of Education and Science of the Republic of Poland under the “Development of Scientific Journals” programme, pursuant to the Regulation of the Minister of Education and Science of 3 August 2021 (Journal of Laws of 2021, item 1514); contract No. RCN/SP/0419/2021/1 (22 December 2022).