Saya mau tau Bacaan lanjut dari Kesatuan Kalmar. Jelaskan dalam bahasa melayu

Gustafsson, Harald. "A State that Failed?" Scandinavian Journal of History (2006) 32#3 pp 205-220 online; Gambaran umum Kesatuan

Helle, Knut, ed. The Cambridge History of Scandinavia, Volume 1: Prehistory to 1520 (2003)  excerpt and text search

Imsen, Steinar. "The Union of Calmar: Northern Great Power or Northern German Outpost?" dalam edisi Christopher Ocker. Politics and Reformations: Communities, Polities, Nations, and Empires (BRILL, 2007)  pp 471-90 online

Kirby, David. Northern Europe in the Early Modern Period. The Baltic World 1492–1772 (1990)

Roberts, Michael. The Early Vasas: A History of Sweden 1523–1611 (1968)