Hē synantēsē Symeōn kai Nikolaou Mystikou, augoustos 913
Subtitle: sta plaisia tou Vyzantinovoulgarikou antagōnismou
By: Alkmēnēs Stauridou-Zaphraka.
Series: Vyzantina keimena kai meletai -- 3
Publisher: Kentron Vyzantinōn Eureunōn
Published: 1972
Place of publication: Thessalonikē
Language: gre
Number of pages: 130
Subjects: Simeon -- I, -- King of Bulgaria, -- 864 or 5-927.; Nicolaus Mysticus, -- Patriarch of Constantinople, -- 852-925.; Byzantine Empire -- History -- Constantine VII Porphyrogenitus, 912-959.
Notes: Bibliography: p.(13)-24.