PINTAR, M.; ZAGORC, B. Impact of nitrogen fertilisation on the economic efficiency of winter wheat yield. Economic of Agriculture, [S. l.], v. 57, n. Spec.num.2, p. 243–250, 2010. Disponível em: https://www.ea.bg.ac.rs/index.php/EA/article/view/997. Acesso em: 5 dec. 2025.