KOPIŃSKI, Jerzy; TUJAKA, Arkadiusz; IGRAS, Janusz. Nitrogen and phosphorus budgets in Poland as a tool for sustainable nutrients management. Acta agriculturae Slovenica, Ljubljana, SI, v. 87, n. 1, p. 173–181, 2006. DOI: 10.14720/aas.2006.87.1.15139. Disponível em: https://journals.uni-lj.si/aas/article/view/15139. Acesso em: 13 jul. 2025.