Friis, Astrid. “Aksel E. Christensen: Dutch Trade to the Baltic about 1600. Studies in the Sound Toll Register and Dutch Shipping Records (Kbh. Og Haag 1941, 480 Sider).”. Historisk Tidsskrift 100 (januar 1, 1944). Set oktober 25, 2020. https://tidsskrift.dk/historisktidsskrift/article/view/50148.