. . "Byzantine Empire" . . . . . . . "He synantēsē Symeōn kai Nikolaou Mystikou" . . . "History" . . "Hē synantēsē Symeōn kai Nikolaou Mystikou, augoustos 913 : sta plaisia tou Vyzantinovoulgarikou antagōnismou" . . "Hē synantēsē Symēon kai Nikolaou Mystikou" . . . . .