Cyril W. Edwards, 'The Strange Case of the Old High German Lullaby', in his: The Beginnings of German Literature: Comparative and Interdisciplinary Approaches to Old High German, Rochester, NY 2002, p. 142-165.
Jacob Grimm, "Über die Göttin Tanfana," Monatsberichte der Berliner Akademie (1859, March 10), pp. 254–58, repr. in Kleinere Schriften, ed. Karl Müllenhoff, volume 5, Berlin: Dümmler, 1871, p. 418–21, p. 418(in German)
Thomas Smith, ed. Francis Smith, Arminius: A History of the German People and of their Legal and Constitutional Customs, from the Days of Julius Caesar to the Time of Charlemagne, London: Blackwood, 1861, OCLC 34219379, p. 126.
Johannes Bühler, Deutsche Geschichte volume 1 Urzeit, Bauerntum und Aristokratie bis um 1100, Berlin: de Gruyter, 1934, repr. 1960, p. 371 note(in German).
"Weder westphälische Grütze noch Götter", Archiv für Geschichte und Alterthumskunde Westphalens 2 (1827), nr. 1, p. 64–68, 64, repr. in Kleinere Schriften volume 6, Berlin: Dümmler, 1882, p. 374–380, 374(in German).
