Heresies of the high Middle Ages /
selected sources translated and annotated by Walter L. Wakefield, Austin P. Evans 
. - New York : London : Columbia University Press,  1969 
. - xiv, 865 p.  24 cm. 
 - (Records of civilization, sources and studies  ; no. 81 )
<br/>К.: Бібліогр. : c. 820-846, Index