MIKKOLA, H. J.; AHOKAS, J. Energy ratios in Finnish agricultural production. Agricultural and Food Science, [S. l.], v. 18, n. 3-4, p. 332–346, 2009. DOI: 10.23986/afsci.5958. Disponível em: https://journal.fi/afs/article/view/5958. Acesso em: 22 nov. 2024.