Hē synantēsē Symeōn kai Nikolaou Mystikou (Augoustos 913) sta plaisia tou Vyzantinovoulgarikou antagōnismou.
Series: Vyzantina keimena kai meletai -- 3
Publisher: Kentron Vyzantinōn Ereunōn
Published: 1972
Place of publication: Thessalonikē
Language: gre
Subjects: Nicholas, -- the Mystic, Saint.; Simeon, -- Tsar of Bulgaria.