Corpus nummorum saeculorum 9-11 qui in Suecia reperti sunt [1,1] : Catalogue of coins from the 9th-11th Centuries found in Sweden. Verzeichnis der in Schweden gefundenen Münzen des 9.-11. Jahrhunderts. 1. Gotland. [1.] Akebäck-Atlingbo. - Malmer, Brita; Rasmusson, N. L. (Almqvist+Wiksell, 1975)