Athanasios I Patriarch of Constantinople ca. 1230-ca. 1323.
The correspondence of Athanasius I, Patriarch of Constantinople: letters to the Emperor Andronicus II, members of the imperial family, and officials /
an edition, translation, and commentary by Alice-Mary Maffry Talbot 
. - Washington : Dumbarton Oaks,  Center for Byzantine Studies,  Trustees for Harvard University,  1975 
. - LII, 467 p.  24 cm. 
 - Corpus fontium historiae Byzantinae  v. 7 .
<br/><label>  ISBN: </label>0-88402-040-1