Parker, Thirty Years War, p. 172

Jan N. Brenner, ‘Secularization: Notes toward the Genealogy’, in Henk de Vries, ed., Religion: Beyond a Concept (New York, 2008), p. 433

Heinz Schilling, ‘War and Peace at the Emergence of Modernity: Europe between State Belligerence, Religious Wars and the Desire for Peace in 1648’, in Bussman and Schilling, War and Peace in Europe, p. 14