Krupanek , Janusz, Beata Michaliszyn-Gabryś, and Manuel Moreno. “ENVIRONMENTAL PERFORMANCE OF PIG MEAT PRODUCTS AND IMPROVEMENT OPPORTUNITIES. CASE STUDY FROM SPAIN”. Economics and Environment 79, no. 4 (January 4, 2022). Accessed April 26, 2024. https://ekonomiaisrodowisko.pl/journal/article/view/408.