The transformation of the Roman world ad 400-900 /
edited by L. Webster, M. Brown 
. - Berkeley ; Los Angeles  : University of California Press,  1997 
. - 258 p. : ill.  25 cm. 
<br/>К.: Бібліогр. : с. 249-255. 
<br/><label>  ISBN: </label>0-520-21060-3