KRAUSE, Monika; HARTUNG, Eberhard. Ammoniakmessungen über Gülleerdbecken. agricultural engineering.eu, [S. l.], v. 57, n. 1, p. 30–31, 2002. DOI: 10.15150/lt.2002.1555. Disponível em: http://195.37.233.11/landtechnik/article/view/2002-57-1-030-031. Acesso em: 7 mai. 2024.