KOBUS, P. Modelling wheat yields variability in Polish voivodeships. Zeszyty Naukowe SGGW w Warszawie - Problemy Rolnictwa Światowego, [S. l.], v. 10, n. 3, p. 33–40, 2010. DOI: 10.22630/PRS.2010.10.3.30. Disponível em: https://prs.sggw.edu.pl/article/view/5734. Acesso em: 14 maj. 2024.