Ševčenko, Ihor.
Ideology, letters and culture in the Byzantine world /
Ihor Sevcenko 
. - London : Variorum Reprints,  1982 
. - 445 p.  ill., map.  23 cm. 
 - Collected studies series  CS155 .
<br/><label>  ISBN: </label>0-86078-101-1