Moreover, the book The Cambridge Medieval History states: “It is easy to imagine that [Cyril] had others to help him, who must have been in the first instance people of native Slav origin with a Greek education.
Grāmatā The Cambridge Medieval History rakstīts: ” Ir viegli iedomāties, ka [Kirilam] bija arī citi palīgi, kas noteikti bija dzimuši slāvi un ieguvuši izglītību grieķu valodā.