Zoltán, András (2015) ???????????? ?????? ? ??????? ? ? ?. = The Byzantine mission of Hungarians in the 10th century. Issues of the Slavic linguistic negotiation. In: Cyril and Methodius: Byzantium and the world of the Slavs. Dimos Thessaloniki, Thessaloniki, pp. 658-663. ISBN 978-618-81018-1-4