Πoλλα τα ετη τoυ πατριαρχoυ. For an acclamation from the church of St. Sophia in Serdica. (Bulg.) -. - Stanev, S. (Archeologija. Organ na Archeologičeskija institut i muzej pri Bălgarskata akademija na naukite, 42,1.2001, 2001)