Grierson, Philip.
Leo III to Nicephorus III, 717-1081. Pt. 1 : Leo III to Michael III, (717-867) /

. - Washington : Dumbarton Oaks Center for Byzantine Studies,  Trustees for Harvard University,  1993 
. - X, 470, XXX p.  30 cm. 
 - Dumbarton Oaks catalogues .
<br/><label>  ISBN: </label>0-88402-045-2