Grierson, Philip.
Leo III to Nicephorus III, 717-1081. Pt. 2 : Basil I to Nicephorus III, (867-1081) /
Philip Grierson 
. - Washington : Dumbarton Oaks Center for Byzantine Studies,  1973 
. - viii, p. 474-887, xxx-lxx  ill., tab.  30 cm. 
<br/><label>  ISBN: </label>0-88401-045-2