Figiel, Szczepan, and Justyna Kufel-Gajda. “Trends in Food Product Innovations and the Level of Economic Development”. Economic and Environmental Studies 17, no. 2 (42) (November 24, 2020): 429–446. Accessed November 17, 2024. https://czasopisma.uni.opole.pl/index.php/ees/article/view/2696.