M. Mullett. The Catholic Reformation (1999), p. 72
W. H. Brackney. Historical dictionary of radical Christianity (2012), p. 45
http://www.oxfordartonline.com/groveart/abstract/10.1093/gao/9781884446054.001.0001/oao-9781884446054-e-7000006409,
2019-04-18