Witkowska-Dąbrowska, Mirosława, Agnieszka Napiórkowska-Baryła, and Natalia Świdyńska. 2020. “Harmonization of Criteria and Operationalization of Sustainable Development Indicators in the Assessment of Bioproducts”. Economics and Environment 72 (1):16. https://www.ekonomiaisrodowisko.pl/journal/article/view/45.