Cederbom, C. ”Maths Bertell, Mr. Frog & Kendra Willson (eds.), Contacts and Networks in the Baltic Sea Region. Austmarr as a Northern Mare nostrum, ca. 500–1500 AD”. 2020. Historisk Tidskrift för Finland, vol. 105, nr 2, augusti 2021, https://journal.fi/htf/article/view/97215.