Vadas Ferenc (szerk.): A Wosinszky Mór Múzeum Évkönyve 15. (Szekszárd, 1990)

Handelsbeziehungen - Johann Callmer: The beginning of the Easteuropean trade connections of Scandinavia and the Baltic Region in the eighth and ninth centuries A. D.

11. Cornelian engraved bead and additional glassbeads from a rich grave at Hedvigsdai, Solna parish, Uppland, Sweden. 51