According to the research of historian András Róna - Tas , '' Hungarians and Europe in the Middle Ages '' , CEU Press the ethnic Avars formed in central Asia in the classical age through a fusion of several tribal elements .
According to the research of historian András Róna - Tas , Hungarians and Europe in the Middle Ages . 
 CEU press the ethnic Avars formed in central Asia in the classical age through a fusion of several tribal elements .