VARIS, E. NPK-lannoituksen vaikutus perunoiden kemialliseen koostumukseen. Agricultural and Food Science, [S. l.], v. 45, n. 5, p. 468–482, 1973. DOI: 10.23986/afsci.72954. Disponível em: https://journal.fi/afs/article/view/72954. Acesso em: 23 nov. 2024.