Patrologia Graeca
PG 113: Constantine Porphyrogenitus (De Thematibus Orientis et Occidentis Libri Duo , Liber de Adminstrando Imperio , Delectus Legum Compendiarius Leonis et Constantini , Constantini Porphyrogeniti Novelle Constitutiones , Excerpta de Legationibus), Nicon monk in Crete, Theodosius the Deacon