KULIKOWSKI, Roman. Productivity and Commercialization of Polish Agriculture. Regional Barometer. Analyses & Prognoses, [S. l.], n. 4 (30), p. 17–29, 2012. DOI: 10.56583/br.1166. Disponível em: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/1166. Acesso em: 6 dec. 2025.