BÓRAWSKI, Piotr. Non-agricultural activity on rural areas as additional source of income of rural families. Zeszyty Naukowe SGGW - Ekonomika i Organizacja Gospodarki Żywnościowej, Warszawa, Polska., n. 75, p. 15–22, 2009. DOI: 10.22630/EIOGZ.2009.75.25. Disponível em: https://eiogz.sggw.edu.pl/article/view/8038. Acesso em: 11 nov. 2026.