KAILA, A.; VIRTANEN, O. Determination of organic phosphorus in samples of peat soils. Agricultural and Food Science, [S. l.], v. 27, n. 1, p. 104–115, 1955. DOI: 10.23986/afsci.71371. Disponível em: https://journal.fi/afs/article/view/71371. Acesso em: 17 jul. 2024.