HELIN, J.; LAUKKANEN, M.; KOIKKALAINEN, K. Abatement costs for agricultural nitrogen and phosphorus loads: a case study of crop farming in south-western Finland. Agricultural and Food Science, [S. l.], v. 15, n. 4, p. 351–374, 2006. DOI: 10.2137/145960606780061452. Disponível em: https://journal.fi/afs/article/view/5851. Acesso em: 10 may. 2024.