Obolensky, Dimitri 1918-.
The Byzantine commonwealth: Eastern Europe, 500-1453 /
Dimitri Obolensky 
. - Crestwood : St. Vladimir's Seminary Press,  1982 
. - 552 p.  ill., map.  23 cm. 
<br/>К.: Бібліогр. : c. 479-515, Index 
<br/><label>  ISBN: </label>0-913836-98-2