ISRAEL, h.; BJORNSSON, s.; STILLER, s. Emanometrische Messungen von Radon und Tlioron in Bodenluft. Annals of Geophysics, [S. l.], v. 15, n. 1, p. 116–126, 1962. DOI: 10.4401/ag-5426. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5426. Acesso em: 4 may. 2024.