Primary Sources

Bernard McGinn, ed., Apocalyptic Spirituality: Treatises and Letters by Lactantius, Adso of Montier-en-Derl, Joachim of Fiore, the Spiritual Franciscans and Savonarola. London: SPCK, 1980. Pbk. ISBN: 0281037450. pp.257.

Secondary Sources

	David Burr, The Spiritual Franciscans: from Protest to Persecution in the Century After Saint Francis. University Park, PA: Pennsylvania State University Press, 2001. Hbk. ISBN: 0271021284. pp.440. {Amazon.com}
	Malcolm D. Lambert, Medieval Heresy: Popular Movements from the Gregorian Reform to the Reformation , 3rd edn. Oxford: Blackwell Publishers, 2002. Pbk. Blackwell Publishers; ISBN: 0631222766. pp.504. {CBD} {Amazon.com} See chapter 11.
	David Saville Muzzey, The Spiritual Franciscans. Washington, DC: American Historical Association, 1914. pp.107.

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