Ladewig Petersen, E. 1998. “Erik Ringmar: Identity, Interest and Action: A Culturel Explanation of Sweden’s Intervention in the Thirty Years War. (Cambridge University Press, 1996). 284 s., 40 £”. Historie/Jyske/Samlinger, nr. 1 (januar):187. https://tidsskrift.dk/historiejyskesamling/article/view/37813.