KAILA, A.; HÄNNINEN, P. Fertilizer nitrogen in soil. Agricultural and Food Science, [S. l.], v. 33, n. 1, p. 169–184, 1961. DOI: 10.23986/afsci.71548. Disponível em: https://journal.fi/afs/article/view/71548. Acesso em: 23 nov. 2024.