- hejsonderborg.dk hedeby-a-viking-town/Having control of Hedeby meant that you had control of the North Sea-Baltic Sea traffic, and helped in the development of Hedeby as a major trading town.
- worldatlas.com articles/what-was-hedeby.htmlThe earliest mention of Hedeby occurred in the 804 Frankish chronicles of Einhard, although the settlement was likely established in 770.
- xcentury.wordpress.com 2013/11/14/hedebyhaithabu/It’s located on Jutland peninsula. Hedeby was first mentioned in the Frankish chronicles of Einhard (804) who was in the service of Charlemagne.
- wikipedia.tr-tr.nina.az Hedeby.htmlHedeby Almanca Haithabu Jutland Yarımadası nın güney ucunda günümüzde Almanya nın Schleswig Holstein eyaletinde bulunan.
- worldheritagesite.org list/Hedeby and DanevirkeThe Archaeological Border Complex of Hedeby and the Danevirke is a relict cultural landscape of a trading centre between Western and Northern Europe.
- britannica.com place/HedebyHedeby, in medieval Danish history, trade centre at the southeastern base of the Jutland Peninsula on the Schlei estuary.
- en-academic.com dic.nsf/enwiki/8463Problems with naming. Both in modern European usage and in Viking times, the names and spellings used for Hedeby were varied and confusing.
- forum.turkmmo.com konu/3867704-hedeby/2018 yılında UNESCO tarafından Hedeby ve Danevirke'deki Arkeolojik Sınır Kompleksi adı ile Dünya Mirası olarak ilan edilmiştir.
- http://viking.archeurope.com settlement/denmark/hedeby/Hedeby had its own mint, which is the earliest known in Scandinavia. ... At the height of settlement, Hedeby had a population of between 1,000 and 1,500 people.