Birka Studies Volume 2. Excavations in the Black Earth 1990. Edited by Björn Ambrosiani and Helen Clarke. Stockholm 1995. The Twelfth Viking Congress. Developments Around the Baltic and the North Sea in the Viking Age. Edited by Björn Ambrosiani and Helen Clarke. Birka Studies Volume 3. Stockholm 1994.

Malmros, R. (1996). Birka Studies Volume 2. Excavations in the Black Earth 1990. Edited by Björn Ambrosiani and Helen Clarke. Stockholm 1995. The Twelfth Viking Congress. Developments Around the Baltic and the North Sea in the Viking Age. Edited by Björn Ambrosiani and Helen Clarke. Birka Studies Volume 3. Stockholm 1994. Historisk Tidsskrift, 16. Hentet fra https://tidsskrift.dk/historisktidsskrift/article/view/53770