Piekut, Marlena. “Expenditure on Goods and Services Related to Intellectual Development Household Members from the Perspective of Rural Household Budgets ”. Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica, no. 20 (January 1, 2015): 59–73. Accessed December 8, 2025. https://czasopisma.uni.lodz.pl/fgsoe/article/view/20861.