RISKU-NORJA, H. The total material requirement -concept applied to agriculture: a case study from Finland. Agricultural and Food Science, [S. l.], v. 8, n. 4-5, p. 393–410, 1999. DOI: 10.23986/afsci.5637. Disponível em: https://journal.fi/afs/article/view/5637. Acesso em: 5 may. 2024.