Kaczorowska, Joanna, Krystyna Rejman, Ewa Halicka, and Aleksandra Prandota. 2019. “Influence of B2C Sustainability Labels in the Purchasing Behaviour of Polish Consumers in the Olive Oil Market”. Olsztyn Economic Journal 14 (3):299-311. https://doi.org/10.31648/oej.4374.